I agree with the no-wireless advice and think you should, overall, get a basic range/quality of speaker in mind and then go and listen to them with varying music. (for instance, Klipsch/Infinity/Polk, maybe Athena).
People swear by their speakers and it is largely a matter of preference, while certain things are always undesirable (some, like the polk R30's?, drop off a lot of the base, while some can't reproduce high notes sharply enough, etc. - some of this depends on whether you are getting a subwoofer I guess)
In general, in my experience, Infinity's are very faithful in that they strive for exacting sound reproduction. They are very "bright" because of this, but to some it is annoying compared to Polks. Polks are very "warm" and mellow in comparison, but the sound is much more natural to many ears. I haven't heard enough of Klipsch but have heard good things about them. (I still like Infinity though a lot of people have been hating on them lately - I think they became passe. . .)
Anyway, have fun! I wish I had the $$ to do this - my TV sucks ass. (oh, and what type of music do you listen to? Or is it just for tv? I find classical/industrial/electronic music fans prefer bright sound, while more rock, probably tv, accoustic, etc. prefer warm speakers. R&B fans just need a subwoofer. :)