I realize you made your decision not to go with the Behringer, but I thought I'd mention that I had a Behringer GM110 analog modeling guitar amp, thirty ss watts, that I wish I still had. Can't find another new one and should look for a good used one I suppose. This was a really nice amp that I had absolutely no problems with. It actually got very good reviews from owners.
That bass head might not be a bad deal, if everything works on it. Supposedly they make some better stuff than they get credit for. I think they make Bugera as well.
Anyway, the bass head would be free from any problems associated with the speakers, needless to say. It would just be an amplifier section and combined with a decent cabinet it might be a good bargain, especially for your limited use.
My general belief is to get as high quality electronic equipment as you can afford to get the anticipated job done, so avoiding this unit for a better one might be a good idea. I just wanted to let you know that I was very happy with my behringer guitar amp - for what it was it was great.
On the other hand, I have a really nice bass practice amp - my Marshall MB30, thirty watt RMS solid state with two channels, normal and overdrive. It has a manually adjustable compression control, three voices, and a lot of tone shaping. It has a ten inch speaker and it totally holds the B string on a five string bass if you ever decide to get one of those. The five string bass requires a lot more from the amp and speaker than a four string. I use mine mainly with my four string basses and when I hook up my Zoom B2.1u multipedal I have more variety of great tones than the average person could ever want, but I usually play it straight in, it sounds that good and has that much tone shaping ability. It costs 199 at the big internet places or places that price match.
I also am lucky to have two other larger bass amps. I bought a Fender Rumble 100 fifteen inch when I got back into bass and just a couple weeks ago got my old mid 80's Peavey TNT 115 two hundred watt combo back from my son. That old Peavey combo is a beautiful bass amp, heavy but in mint condition and produces a beautiful array of sounds. It isn't portable like my Marshall. That little Marshall has just enough volume to make a great at home practice amp and has good line out capabilities. I would suggest to anyone looking for a small bass amp to check out those relatively new design Marshalls. They really do a nice job and are not more expensive than the competition but seem to me at least, to do a better job of being a good little bass amp. The tone on that little Marshall will surprise you, plus it has a range of sounds that make it very desirable and useful. I should put my computer interfaces to work and make some sound clips. The little Marshall would definitely do justice to your awesome bass, at least at home or lined out.