Hi! I want to upgrade my mains (currently HTIB speakers) with some nice towers.
Basically, I want main speakers that perform decently in stereo mode so that I can enjoy music that's rich in details and they should do a better job with movies then my current "speakers". My setup is a Yamaha HTR-5640 A/V receiver with HTIB (I know, I know) speakers.

I was quite sceptical considering that my budget is only $250 for the speakers, but I found some good deals. I kind of reduced the choice to the following 2:
1. Yamaha NS-A100XT
2. Polk Audio R50
I'm pretty sure there are other good deals out there that I'm unaware of. If you could tell me about them or comment the ones I found, I would appreciate it. Thank You!