First of all, I am moving this thread into Gear/Maint where I feel you will get better responses.
I have the Prosine 2.0 Inv/Charger. I have been extremely pleased with it and will say that it is one of the best things I have put on my boat. It works great and no issues.
I will say that I would have purchased the Outback model versuis Xantrrex if it would have not been such a odd shape. But the Xantrex fit perfectly on the 400 (where we desired to mount it) so that was our strong preference.
I would look at the Iota and the Outback. THe Outback is probably more money (even more than Xantrex), but their products are top notch.
A few words of caution:
1) You better choose your locatio for the unit carefully. If you mount it very close to the battery bank, you can get away with 4/0 cabelling (not that is 0000, not 4 gauge). THis means that the cabeling is as large around as your thumb, or larger. It should be tinned, though many people do not buy tinned due to the cost. You probably will not be able to get this via a West Marine (and certainly not in the store). You will need to order from a manufacturer. I used Cobra cabelling and bought tinned, but to each his own. If you cannot make the loop (in 25 feet I think, that is 12 feet of cabelling), you have to jump up to 250 or 350 mcm cabelling which is huge. Just so you know, 4/0 is larger than the leads coming into your house from the power company.
2) You will have to measure carefully and purchase the 4/0 (or larger) lugs. You cannot crimp thoses except with a very specific crimping tool and you need to start looking around now for where to rent it or borrow it. West Marine stores used to have one you could use if you brought it in, but that requires very precise measurements and many of the stores do not carry the crimpers for that large of cabelling. DO not bother trying to use that hammer-crimper thing unless you have the arm of Paul Bunyan (and don't kid yourself, you don't!!). Get the right tool and do it right.
3) If you are not very good with electricity, do not put the thing in yourself. Get a GOOD MARINE electrician. Screwing up the wiring on your inverter is a great way to burn your boat to the waterline or just plain meet your maker in execution style.
4) I installed mine. If you have questions, PM me and I will see if I can help.
Good luck with your decision. I agree with Tom Neale, the inverter was in the top 5 of the best things we have put on our boat.