1+ years from my above post I still love this amp. I think you should get a 252 or move direct to 501s. I also love the shorter size of these amps. 250 RMS (this amp puts out 325 RMS or 30% than published in reality) should be ample for most speakers.
Enjoy reading the Tone Audio 2009 review,
http://www.tonepublications.com/MAGPDF/TA_021.pdf