Vintage Fisher, What's best 500C/B or 800B?


I have the opportunity to purchase cosmetically mint units of the above at an estate sale. Each of these receivers work, yet must be upgraded and restored sonically. I know about the resto-paks, etc.; but which unit is best? And what individual or company would you recommend for complete restore. I missed out on a seemingly nice 500C unit on the A-gon recently...but just fell into the above estate sale. I am a bottlehead, but haven't really heard any of these since I was a child. I'd like to take a shot at one or two of them.
mikirob
Thank you for your responses...it helps. I think I'm opting for the 500C based on the larger transformers and a few reviews I've seen since posting this question.
Make sure the filter capacitors in the power supply are replaced before running the unit! Power transformers for those receivers are not all that easy to find; that is what is at risk if the caps are not serviced out.