At one time I had 47 Labs Flatfish transport that was modified to the hilt with a Super Clock, BG caps and upgraded resistors in the internal power supply. It was powered by a very custom and clean battery power supply. This unit was by far the ultimate in transports with over 6k invested. To do this today will run about 10k. Unfortunately I had to unload it to cover medical bills.
Fast forward to a few months ago when I picked up PWT reurb, and it sounds real good. To take it up many notches I use an iFi SPDIF iPurifier ($150.00) on the coaxial input on my DAC (Digital Audio Company DAC HS) The iFi SPDIF iPurifier comes with its own very good power supply, but for s#*ts and giggles I purchased an Uptone Audio UltraCap LPS-1 ($410.00 delivered). The LPS-1 was a significant upgrade over the supplied iFi power supply and now I'm very close if not right there with the 47 Labs transport I once owned for way less $$!
If 1k is your limit purchase a PWT and save your milk money for a SPDIF iPurifier, sign up for a human drug trial for the LPS-1, and enjoy your music collection like never before.
Chris