What about a hybrid, or a fully tubed integrated that's very easy on the tubes?
The Pathos and Unison lines have hybrids, as does Audio Aero. I think generally the power tubes are the ones that cause the most headache. One of these hybrids that utilizes a tube preamp stage and an SS output might be the ticket. Alternatively, BAT makes a great integrated and the tubes are said to last for 10,000 hours. I have no personal experience to back that up, but I think it's worth mentioning.