all depends on you... everyone's got their own definition of perfect speakers... for me i don't think i'll ever own any speakers that don't come from DLS (
http://www.dls.se/ ) because i'm a big fan of silk dome tweeters and you can't beat the price of their audiophile quality/competition level component sets. others prefer metal tweeters (be it aluminum or titanium or whatever else) and two companies that seem to have that whole thing nailed are focal and mb quart.
it's all going to depend on you though, your tastes and more importantly your budget. gonna have to be a little more specific.