BBM, I am using your amps matching preamp, GFP-555 mkII as a phono preamp. I bought it from the original owner who I worked with at a higher end stereo shop when I was in college in the early 90's. He had upgraded to the at the time brand new Adcom GFP and GFA-5802.
table and amps:
adcom as phono, tube preamp, tape deck, and Eico tube tuner:
and everything runs through a set of these vintage 1970's Altec Valencia speakers:
I often look for vintage audio equipment at thrift stores and garage sales as well. My best buy so far was a set of JBL speakers (D130a woofers, LE175 tweeter, and N1200 crossover) that I picked up at a Salvation Army for $30 pair. They are in the basement powered by a non-vintage Harman Kardon receiver. I want to power them with the Fisher 600 tube receiver my aunt gave me, but I need to get it fixed first. I haven't found anyone local just yet that works on vintage tube equipment.
Here is what the JBL's look like: