Help me choose sub-$200 bookshelf speakers

I'm a beginner looking to get a home audio/home theater started. I'm thinking about getting a Denon 1613 or 1612 receiver and a pair of bookshelf speakers to kick things off. The room we have now is quite small (~14 x ~14ft), but we rent and will most likely be moving in the next couple of years. In the future I'll be adding a center, sub, and rears (probably in that order. Possibly adding towers and moving the bookshelf speakers to rears). I'm looking to use these to listen to music from MP3 and streaming sources and watching TV and movies. Some of the speakers I'm considering are:

Polk Monitor 30, 35, 40, and 45 Polk RTI 4 and 6 Polk RTI A1 and A3 (over budget, but I hear they go on sale on Newegg reasonably often and I read good reviews on stereophile) Boston Acoustics CS 26 II Cambridge Soundworks Model 6 Infinity Primus p163 Pioneer SP BS22 (I know these have gotten great reviews, but FWIW I don't really care for the looks of the grills) Dayton B652

What say you about my options? I'd like to get something that offers a matching center for my future expansion plans. As a reference point, I have some old Klipsch pro media 2.1 speakers hooked up to my computer now, which I think sounds pretty good, but the bass is a little loose/muddy sounding to me.