Pro audio might be the way to go for a party system. I have an old Ashly FET-200 that is 100 WPC into 8 ohms and about 160 WPC into 4 ohms. Cooling fan noise is the drawback, but may not be an issue for party use. A new, quieter fan could be easily installed if necessary. Tank-like reliability, and low cost are the benefits. I was also surprised by the good sound quality. I would let mine go for somewhere around $100 plus shipping.