With 15K to burn you can get into some tube mania...be warned as tubes can be extremely addictive. After over 40 years using tubes in guitar and bass amps I have never had one blow up, and those things get bounced all over the damn place. Kind of like your dealer saying, "I've seen heavy amps dropped on people's feet." In my hifi heap I recently switched from a SS power amp to a tube amp and I absolutely love it, it's fun, I prefer the sound of tubes, and I now have collections of tubes to play with. The ones that aren't plugged in...I just play with them on the floor...roll around, put little pants on them, draw little faces, give them names...