bro check sensations forum on xda, its got pretty good roms. Cyanogen 7 is available now as well. Even if there are more for the galaxy s, you wont be using all of them 
As far as i know, a couple of friends of mine are using sensation and they havent got any death grip issues at all. basically death grip comes into play when ones using 3g or 4g. In Pakistan you dont have to worry about it. As far as battery is concerned, all dual cores are power hungry. SGS2 get hot after continuous use. In the end no phones perfect. 
but jo bhi hai bhai, SENSE UI love hai 