There is no such thing as too much tubes in your system. Good tube gear does not sound slow and bloated, that is bad gear or speakers that are in incompatible match with the tube gear. If you have the proper speakers there is no need to compromise with a solid-state amp. A good tube amp will Soundstage better and do 3-D presence better.
Based on your list I would look at different speakers, kill the speed controller and potentially look at other amplifiers. Most importantly when you're looking at speakers get ones with high-efficiency that have a nominal impedance of at least eight homes and a flat impedance curve. If you get very appropriate speakers you can go with set or OTL both of which sounds better than regular pentode tube amps.
Based on your list I would look at different speakers, kill the speed controller and potentially look at other amplifiers. Most importantly when you're looking at speakers get ones with high-efficiency that have a nominal impedance of at least eight homes and a flat impedance curve. If you get very appropriate speakers you can go with set or OTL both of which sounds better than regular pentode tube amps.