Greazer Mon...
Tube heads can work GREAT with DBs. Some suggest they are not the best, but I've known plenty of guys who've played through SVTs that have sounded phenominal.
Personally, when it comes to guitar work, for example, I believe there is absolutely, positively NO substitute for all-tube amps. However, I think it can be quite a different story for bass. For many, the mark of a good bass amp is CLEAN headroom, while the guitarist looks for that natural tube saturation or overdrive. Now, a high-powered tube bass amp (like an SVT, Sunn, Marshall 400 and likely your TE and others) can provide plenty of that clean headroom at rediculous volume levels, there are so many great solid state products out there today that do the same in far lighter packages and with drastically lower maintenence costs (have you had to retube 6x6550's lately??).
The bottom line is that if what you've got works for YOU, that's ALL that matters. If you decide it's not giving you the kind of tone, headroom and response you're hearing in your head, I'm sure the TalkBassers will have plenty of great suggestions to consider.
brent