Sounds good to me man. I was looking at CP not long ago also, i'm fairly certain if you check their website a 12.5:1 is offered, dont quote me on that though.
The HC2 is great as well, i'm sure you have or have run them. Not the best or most aggressive but they are probably best bang for the buck.
I put the Hinson basket, springs and slutch pack in mine about a month ago and not disappointed at all. I opted for the steel one. It's high-carbon steel and heat treated. It will last longer than me i'm sure. Upon opening the box and holding it you get a sense of "man this thing is nice"
Like i've said before to others can deck it alittle bit and bump your compression if you have to run a 12:1. Mine was that way when i got so i'm stuck with it. Not that it's bad, but cant ever take it back to true stock. Other option get the 13:1 and use 2 gaskets, that's what is in mine currently.
As far as your swinger setup, dont know much about them, i've never run one. The only one i've seen/ridden with was a friend with a Houser. He's never had problems and says he likes it. I personally like Houser products, very well made as i have some grabbars, probounce nerfs and a steering stem.
1999 400ex -- Sunday driver ----****SOLD****
Wiseco 426. 11 :1, Hotcam Stage 2, Curtis Sparks X-6 full exhaust, Houser 450r Probounce nerfs. (black silvervein) Holeshot GNCC's on T-9 Itp baja, Maier carbon fiber plastics, Houser antivibe stem with Renthals/ODI Rouges, Lonestar doublerow carrier, 170 main no lid -- 50/50 turbo blue and 93. '07 450R shocks
2005 450R -- The Sleeper --
Bumped up compression, stage 2 hotcam,hotrods bottom, Dasa full system, uni filter and jetted, stainless brake lines, rath nerfs and heels, quadtech hood, Fluidyne radiator, ported and polished, houser grabbar, Hinson'd out.