Coustic Design Reference Amp-505DR (rated 50w x 2, benched at 77.8w x 2 @ 4ohm) and a Coustic Design Reference Amp-510DR (rated 100w x 2)
Don't let the name Coustic fool you. These are old school (early to mid '90s) high end sound quality amps designed and built before Coustic sold out to Mitek. Designed in assistance with Richard Coe, who is one of the pioneers of the car audio industry.
My friend is selling his JBL P180.2 amp. It does 90wRMS x2 @4ohm. He bought it brand new but only used it for about a week before he went with a different setup. Its been sitting in his room for about a year now. Let me know if you are intrested. PM me