I am also a musician with similar tastes, although I rarely listen to piano. I have made a hobby of auditioning budget gear. I have decided while there is a very real difference between good budget gear and the high priced, it is not enough of a difference for me personally. That being said, I have settled on the following. (Prices are new, you can do much better on Audiogon)
Integrated Amp: NAD C320Bee ($399)
Speakers: PSB Image 2B ($399)
PSB Subzero ($329)
I am very pleased with this system and I believe it will do me well for a quite a while. While I was hesitant to add the sub, it was the final step to getting the sound I wanted. It is rarely heard, but it seems to free up the monitors to handle the mid and high's with more detail. You need good stands for the monitors. I tried without and there was quite a difference. I made my own because, for the money, I didn't think what was available was worth it.
Hope this helps.