What a thoughtful set of suggestions!
I do think I need 200 watts or so from a combo, as I can't expend PA miking: in this case, size matters.
I'm wondering if there's some no-name or diamond in the rough that the insiders know about that does the ampeg/fender/mesa/etc warmth plus clarity at a better price and with good power. Used is even better!
Please think of when you buy that bass amp/combo that's right for you, having a DI option on the amp is a nice, nice feature.
A.) If you ever need it, and even if you don't, you'll have it there already on the amp.
B.) No separate DI box to carry around, and consequently, risk loosing. (seen it happen more times that I can say)
C.) Even if you don't need the obvious volume potential that a DI unit in conjunction with a PA system can provide, even adding a touch of your signal in any mains/FOH system can help immesurably with bass signal presence. This isn't so much for your tone shaping on stage (you control that), but for what the audience actually does hear, which is not always what you think they will hear. Aka- a DI (and with the right soundperson) enables you to BETTER give the audience the sound you think they should hear, to a large degree.
And worst-case scenario, you could always at a DI box to your setup later if/as needed.
