I'll probably get the hammer for this, but: Peavey.
Fantastic Technical Support for their bass amps (and their MIA products in general).
Pick up the phone, they answer. Email, they respond. Their website is great and full of support tools as well.
I don't think anyone will disagree about the reliability of Peavey gear (the level of support is something I wasn't familiar with, but good to know) - I've referred to them as the brick shithouses of the amp world here before myself (they really take a beating). The issue with them is more the sound; not a good reputation, as they do have a specific colour to their solid state gear that may not be for everyone. Their tube amps are really good sounding IMHO, and they also make some good speaker drive units (The Scorpion line for bass/PA is rock solid and good sounding, and the Sheffield 12s for guitar are also desirable).
As for my recommendation: I third for GK, especially the 400RB (200 watts) and related models (note, I have only used, and base my opinion on the old black and grey ones, the 400RB I, the new ones with the ovular grille on the front, the 400RB IV, I have never tried, but I assume, until I experience/hear otherwise, that they are just as good, given the pedigree) are incredibly reliable and good sounding if simple/not many bells and whistles. They (either the old or new ones) are also dirt cheap (used on ebay - any version, I through IV, can be easily had for <200; the 400RB IV is available new for about $500). Best bass amp value ever, IMHO, and solid as hell - most hourly rehearsal spaces around here are still rocking 400RBs they purchased in the 80s and that's a punishing existence let me assure you.