Shopping for home-theater components touches on a number of fear factors--not the least of which is sheer cost. Even after you've picked out the perfect television, A/V receiver, and DVD deck, you still have speakers to contend with. And while you certainly don't want to skimp on sound, all these components are probably starting to add up. To ease the pain in your pocketbook a bit, we've picked out the best speaker values in a variety of categories--compact, full-size, floor-standing, and center-channel. They won't break the bank, but more importantly, they sound good. Really good.