Thanks for all the advice. When I think I am ready I am going to haunt the usual sites for a used piece of equipment in the Atlanta area. It looks like at any one time there are several 6" in Craig's and the occasional 8". Bargains (or at least significant discounts off retail) are common in the 6" class and if I go that route I will look for a deal on a name machine in decent shape that I will have a chance to recoup some of the investment in if I upgrade. If I happen to find an 8" within my pain tolerance I will probably go that route, but the poster who suggested that a 6" is better than a 0" hit the nail on the head.
Thanks again all!
Doug