SL - Why don't you like the Yamaha's 800/1200 models?
A combination of cost to repair, which is high, and the fact that an un-modded 800/1200 is kind of a dog, they weren't really that much fun to ride... they're ok for a beginner and for my dad (who's 65) to ride.
I owned an XL760, XL800, and the GP1200 ,
I found the 800 to really just have no POP inside that big hull, just a little better than my 760 but nothing to get excied about, it was a nice distance cruising ski but i definitely couldn't turn on a dime.
the GP1200 wasn't really that much faster, just a little more on the top end, had to mess with it to resolve the horrendous porpoising issues (poor hull design) and of course a top end on a 1200 is pricey...
they were ok for long distance cruising, and the XL models do handle chop well, and offer TONS of storage but the fun factor just wasn't there...
After buying the XL800 pretty cheap and putting a crank/top end in it, I thought it was going to be my #2 ski, but at the time my buddy had a GSX and we used to trade back and forth now and then, the only thing my 800 was good for is keeping all the extra stuff, cooler, tools, towels, etc... the GSX was SO much more fun to ride.... so I sold the XL800 and got a XPL with the wishbone hull, it was better, and had great top end, but still wasn't that much 'fun', so I sold the XPL and continued my search...
Then i stumbled across a GP1200, got it super cheap and it only cost about $400 to get it water ready, and I thought, wow... this is going to be awesome... and it was just plain awful !!!! my buddy's were literally riding circles around me on their XP's while i puttered along, the only thing I had going for me was that I had all the beer and sandwiches in my storage bin so they wouldn't splash me cuz they didn't want the "beer guy" mad at them...
bottom line, I was always asking my buddies with their 96xp's to let me take a spin, and i'd go zip around, do 180's, 360's, jump wake, get tossed the ski, climb back on and repeat, I was yeeeehaaaaing, and whooooooping when I rode the X4 hulls, and after 10 minutes i was breathing heavy, completely soaked and had lost my hat

, now.. thats FUN !!!
When I was on my yamilogs, i was taking in the scenery, sipping my water bottle, and pretty much just puttering along in a straight line.. that's fine when your wife is on the back and you want some cuddle time... but lets face it, cuddle time isn't what a ski is designed for...