I've done a fair share of research on inverters. I'm was going to put in a prosine 2.0 but got a good deal on a rv2512 on ebay. Xantrex has a new one out the rs model. You can get a gen start for most models, however customer service at xantrex told me it will only work with Onan quiet diesel 7.5, 8, 10 and 12. He said you might be able to wire it for a different gen. For what it is worth. RV add on has the best price on prosine 2.0 $1349 del.
http://www.rvaddons.com/default.asp?cmd=displayproduct&...ken=OLESLFOVKJA1 KZ8I
Anyone wired a genstart to a different gen other than an onan quiet diesel? I think Inverter, golfcart batteries, solar panels and a generator are the way to go.