Pat. Good info on here. You have plenty of time so I am sure by the time you have to make the decision, you will know exactly what you want.
Gibby is right, I do not run the wedge and choose to use ballast/lead only (3800-4800 approx). scroll down to next paragraph if you have heard this before: A22, no wedge, 335 CAT motor, 750's in locker, front pnp under seats, 400 lead at the very tips in the bow. I ordered it with the OJ core 4 blade (14.75 x 12 i think). I did not like the prop for many reasons, but it did get my boat up on plane, full fuel, 4-6 adults plus a kid, gear, 1400 elevation. Prop is loud, has top speed of 35ish and wakeboarding rpms were high. The OJ Cinco came out with everyone raving about it (similar to the excitement of the new ACME 2300 series). So a bunch of us got it on a deal. I personally like the prop and somewhere I did a same day, side by side comparison on both the OJ core and OJ cinco. I have an Acme 1235 at my disposal and will be testing that thing soon, and will add that prop to the other 2 so that prop buyers will have some good data to help decide. I hope someone uses my format and tests those acme 2300's so we can add to the list.
The A20 needs less weight than the A22 which is good news. And I agree with gibby that the Axis in general like bow weight. So a couple hundred pounds in hidden led in the tips will be money for your boat.
As for the Straighline Sumo series. I rode today and tested the 600 sumo. Short story, it is a great sac and perfect for the A20 or A22 owner who is looking at the 400's or 750's. If you plan on being a serious surfer and are looking at the 1100's as an option, then just get the 1100's. But if you are looking at the 750's, I say get the sumo 600's.
They have 2 drain holes and 2 fill/vent holes plus a big center hole that is the burp hole/ fill hole for the tsunami pumps. So in total 5 holes. They come with 4 90deg threaded PNP quick disconnect adapters like the fly-hi system has. They thread in real easy, hand tight, and they did not leak. The pnp quick disconnects that I currently have worked on the sumo sac exactly like the fly high. It took me about 20 seconds to switch out my 750 for the 600. As you may know already, the flyhigh 750's are too long for the rear lockers, so they stick under the back seat bracing and hose/wire carpeted cover. My 750's get smooshed in the front causing the rears to stick up a little bit, making them look like a wedge sack. Their is a little bit of air tapped in there unless you burp it once it's almost full. ( No big deal, only a couple gallons at max) If the 750 rating is correct, then I would guess my sacs are around 700 when completely full. The 600's fit perfectly. they fill up completely and do not put pressure on that front hose/wire cover and do not get pinched off. (there is an L bracket with a screw at the bottom of both hose/wire covers that put pressure on my 750's and I can see the mark where it hits, so far no leaks) The 600's were about 2-3" taller in the back and came up to about 2" from the bottom of the locker edge, the 750's are about 4" from the bottom. The front of the 600's are just as high, but the 750's slant down in the front because of the cover. If the 600 rating is correct, then they are 600 lbs in the locker as they fully fill and expand. Another good thing about the 600's is that it does not take up any of the rear bench corner storage like my 750's do.
Now for the wake: I ran full ballast today except I switched out ONE 750 for one sumo 600. I also ran my 800 lbs floor sack (that is dope by the way
) full fuel, 3 adult males, 1 child, gear... etc. When filling the rears, the side that had the 750 in it filled first by 30-60 seconds. If my pumps are equal, that would lead me to believe that the 600's actually hold more weight. However, I do recall that one side usually fills faster than the other side and I do not remember which side it is. Even so, if the side with the 600 normally fills slower, then there was no change in fill times over the 750's so they weight approx the same. If the side with the 750 fills slower, then the 600 sac holds a lot more water than the 750. Once the boat was completely full, it sat perfectly even from left to right, and when riding behind it, the wake looked normal and we did not have to shift people or lead to clean up the 600 side. I would say that they are almost exactly the same weight.
If I did not already have my 750's, I would be buying the straight-line SUMO 600s for sure. They are available at wakemakers right now. As for the bow sack, I was told today they will not be ready for the market until about march-april of next year.