For me, somebody that was a die hard big rig fan... the last thing I want now is take a conventional bass rig to a gig. A modeller and inears for me please.
I'd much rather rock up with a modeller that makes your bass sound like its been recorded in a studio. Yes, you can mic up your live rig but there will be a compomise along the way. DI - will give you just your DI and not the sound of your speaker cab. Micing up the speaker cab will give you a close miced sound but will introduce bleed from the other noises being made on the stage. Yes, you could use a speaker emulator on your DI - but that's another component to carry around with your rig.
The modelling route appeals to me because it gives you the recorded rig sound without the complication. If you are an fx unit user - all the fx you could want (within reason) are in there. The volumes are far more controllable - no more "I need to drive my amp hard to get the power tube distortion that I am craving...". The sound is consistent and instantly recallable from gig to gig. Any tweaks for a specific venue can be made and saved to memory for reuse. If you aren't a big fx user... and not into loads of different sounds, something not as involved as the Helix could be order of the day. As long as you dig the core tone, you are good to go. Of course, you can still use your existing fx pedals etc (if you use them) with a modeller also.
If you need a cab to hear yourself on stage, then a good FRFR PA cab will outperform most bass specific cabs. Again, light, portable and multipurpose (a modeller and cab will do the job for both guitar and bass - if you play both).
I like inears - less to carry and everything sounds a lot clearer - if you want to learn more about that, you could do worse than read through this thread -
(grab yourself a cuppa...)