Hi Thinking of a change in amp. I have a Rega Jupiter CD, with Rega Cursa pre and bi amp configuration of two Rega Maia's driving the glorious ProAc Response SC1's. Looking for a more subtle sound tat the present set up, always liked the valve amp approach, but have no experience of what to try. For simplicity I'd like to go with an intergrated amp, no phono stage required that'll suit my speakers. Budget? ummm £1500, what about buying second hand?