I can second every word @millercarbon wrote. Absolutely my approach. Keep it simple. A good 'speaker with easy load and smith like 92-94dB and a high quality integrated about 40-50W is probably the easiest way to get a good enough sound for sane money.
As for the tubes, look for a good design that doesn't put much pressure on the tubes and it will last for many years trouble-free. I had several EAR Yoshinos throughout the years and never had to change a single tube. With my current LTA Z40 the tubes are running at lower current (about 1/3) and cooler than most amps. So I hope it to last for many years.
As for the tubes, look for a good design that doesn't put much pressure on the tubes and it will last for many years trouble-free. I had several EAR Yoshinos throughout the years and never had to change a single tube. With my current LTA Z40 the tubes are running at lower current (about 1/3) and cooler than most amps. So I hope it to last for many years.