I recently acquired a Marantz 7 with intentions in setting up a second system that would be more or less a vintage set up.
@c_cocobean I hope the work you are having done is having the power supply rebuilt in that preamp (or it was recently done prior to purchase). If it is stock and still working, it won't be for long and when it fails it can take out the power transformer which would be tragic. It also will not sound right if the power supply is compromised!
It will work fine with any vintage amp. One of the best vintage amps is the Harmon Kardon Citation 2. If you have one that is properly refurbished, and if your preamp is also, you may find the 'vintage' sound to be quite excellent. Have fun!