In your situation, it seems that a good approach may be, the simpler, the better, since it is going to take a while to get back "up to speed" on everything. Using a tube amp definitely doesn’t fall into the simpler category, as there are more speaker compatibility concerns to be addressed, and also because the tubes themselves at some point will need attention.
For you, I like the idea of an easy to use solid state integrated amp. McIntosh makes some really nice ones, and the new Anthem STR integrated looks nice as well. Both should have what it takes to drive the 803s decently. With regard to your interest in "warming up" your sound, you should know that the McIntosh MA 8900 integrated amp includes extensive tone controls, so that you can tailor the sound to your liking.
I’m surprised that a dealer suggested a tube amp for those speakers. Also, I strongly recommend getting out to as many dealers as you can to see what’s out there now days, and, at this level of equipment, I’d suggest working with a dealer for future purchases. It’s real easy to purchase equipment that does not complement very well the equipment you already have, such as the 803s.
For you, I like the idea of an easy to use solid state integrated amp. McIntosh makes some really nice ones, and the new Anthem STR integrated looks nice as well. Both should have what it takes to drive the 803s decently. With regard to your interest in "warming up" your sound, you should know that the McIntosh MA 8900 integrated amp includes extensive tone controls, so that you can tailor the sound to your liking.
I’m surprised that a dealer suggested a tube amp for those speakers. Also, I strongly recommend getting out to as many dealers as you can to see what’s out there now days, and, at this level of equipment, I’d suggest working with a dealer for future purchases. It’s real easy to purchase equipment that does not complement very well the equipment you already have, such as the 803s.