I can get this new on sale for $400. It looks like an awesome amp. My last car system I built I used an Audison LRX6.9 amp and it was about $1000...it looks to have near identical specs...so I am probably gonna buy it. I am using a Nakamichi CD500 head unit, and will be getting some good mid-line components, Polk Audio or Boston Acoustics. I also will be building a sealed 8 enclosure for the low end. Its all going into my 1976 BMW 2002. Just wanna know if the Polk PA1100.5 will be a good amp for all that and provide trouble free operation and good sound quality. Thanks. I did a search and didnt see any opinions on this particular amp.