Hybrids will fit the bill nicely with tubes in the preamp stage and SS output stage. There is very little fussing you need to do with the signal tubes in the pre stage and they typically last 5000-10000hrs (depending on the amp design and signal tubes used). Suggestions:
Pathos Logos (100 wpc)
Vincent SV-236 Mk II (150 wpc)
Pathos Logos (100 wpc)
Vincent SV-236 Mk II (150 wpc)