Good feedback. That was the one thing I wasn't sure about with the Bic H-100. I didn't know how linear it was up above 100hz. Sounds like it isn't a very good match with small satellites. Most home subs aren't really designed to play really high. 80hz is a pretty standard crossover that almost any sub can be used at successfully, but if you need to use a crossover of 120hz or higher, many subs just won't do a very good job. Getting larger mains is a good idea. I think you'll notice an immediate improvement, especially with music. Satellite speakers are convenient but they really can't dig deep enough to allow for proper subwoofer integration, IMO. Even when using a sub that can successfully integrate with satellites at a 120hz or 150hz crossover, the sub then becomes too localizable as it's being asked to play frequencies that our ears find to be directional. Again, thanks for the feedback. Based on your impressions, I'd advise the OP not to go for the Bic if he is pursuing the Quintets.
To the OP: are you set on the Quintets or did you just like them because they're relatively inexpensive? If you need tiny speakers, they're a good choice on a low budget, but for a similar price you can get bookshelf speakers that will give significantly better performance, especially with music. If you're open to other suggestions, you could go with two pairs of Polk R150 bookshelf speakers from frys.com ($49.99 per pair) and a Polk CSR Center speaker (usually $80-$100). This would give you 5.0 for probably about $250 including shipping, and you could get the Bic or another capable sub and use a more normal crossover of 80hz since the bookshelf speakers can play low enough. Just a thought. Though if you're set on the Klipsch, feel free to disregard the idea. Good luck!