So this setup will play music from an iPod, probably through an mp3 cable (through an auxiliary cable).
I've picked out the newer version of the Lepai (http://www.amazon.com/Version-Upgraded-LP-2020A-Amplifier-Shipping/dp/B00C2P61FO/ref=pd_cp_e_0) amp most people recommend (should I get the older, potentially more reliable version? (http://www.amazon.com/Lepai-Tripath-TA2020-Class-T-Amplifier/dp/B0049P6OTI/ref=sr_1_cc_1?s=musical-instruments&ie=UTF8&qid=1318207920&sr=1-1-catcorr)).
I've also picked out the Micca MB42 (http://www.amazon.com/Micca-MB42-Bookshelf-Speakers-Tweeter/dp/B009IUIV4A/ref=pd_sim_MI_3) bookshelf speakers.
I have a few quick questions.
1) Will the fact that I'm playing from an mp3 player hurt the sound quality substantially?
2) Is it possible to add in a subwoofer to the Lepai afterwards? I noticed it's only got Right and Left outputs (this is a dumb question, I know), and no sub out. Also, will it have enough power to power a subwoofer (not sure how many watts, but a typical budget well-reviewed woofer like Polk PSW10 or something)?
3) Also, would it be better to get Pioneer BS22s now and forego a subwoofer completely? I realize that you probably won't like this, but I like a really heavy bass sometimes. I'm no audiophile... sometimes I want to listen to something that makes the floor shake. So I do kind of want a subwoofer.