I would look at the EMP HTP-351 bookshelves 5.1 system for $489. The speakers are supposed to be comparable to RBH models. The subwoofer is rated down to 30 Hz, and it sounds very good as do the other speakers in the set. If you price out the invidivual speakers in the set on the AH site you will find this set is a real bargain at $489.
EMP HTP-351 5.1 (bookshelf) Speaker System (list $1319) $489 (AH Store)
2 pairs of EF30 Bookshelf Speakers (2x$299 sale = $598)(AH Store)
1 EF30C Center Channel Speaker (1x$190=$190 sale)(AH Store)
1 E10s Powered Subwoofer (1x$349.95=$349.95 sale)(AH Store)
Total price bought separately = $598+$190+$349.95=$1137.90
Package on sale is 57% off individual pieces on sale.
RBH TK-5C review comparable to EMP EF30 bookshelf
http://www.audioholics.com/reviews/speakers/bookshelf/tk-5c
I thought they sounded great for the price and the subwoofer sounded great hooked up to an Onkyo 606 with Audyssey frequency and time domain equalization.