In search of Power Amp replacement

I'm powering a pair of Clements RT-7's (T-line & ribbons) 6.5 ohm and have a Forte Audio Model 2 Pre. These are not the most efficient speakers on the planet but I have grown to love the way they sound. They have very deep bass and the amp would need to shine in the lower registers. Bryston and Creek have been suggested to me but I've not heard either yet. The sticky point is my current budget. I need to keep the cost in the 1k range(new or used). I would appreciate any and all suggestions.