You don't specify your maximum price range, so let me add a couple of options. At the lowest cost, you might consider the Outlaw 5-channel amp. The relatively new Outlaw line of equipment has gotten very good reviews, and they sell direct via Internet (their 5-channel HT amp sells for $1100). Next up in price is the Adcom 7500, which provides 5x150 wpc, with a price of around $1800. Last, if you want to go for very high quality HT sound, you should audition the Bryston 9B-ST, which has rated "Class A" by Stereophile. It's a good deal more money (MSRP of $3800, as I recall, but can be bought discounted for around $2800).
