I wouldn't go with a vintage preamp. I had the Krell in my system for a while and I've owned the Pass and neither was all that great when they were current, let alone what you can get for a more modern preamp used. You can make a case for a vintage amp, especially tube, but I was never impressed with vintage preamps.
If you absolutely must go with a vintage SS preamp, I think Rowland and Levinson preamps from that era are much better.
If you absolutely must go with a vintage SS preamp, I think Rowland and Levinson preamps from that era are much better.