id say if you can get yer hands on one for pretty cheap, go for it. i have a concert lead and a concert bass... had a problem with the lead cutting out (probably a bad heat sensing circuit), possibly the same problem with the bass (but i think it just got pulled out of the outlet durin a gig).
if possible, i would go for a tube head, but thats just my preference. however the concert bass has some good tone and decent amount of volume... but no reverb! what ya should do, is buy a concert lead instead and use it for bass...they are almost identical; the bass has one channel and no reverb.