IMO, a lot depends on what you want to achieve with your set up.
Do you want to run the DI into the PA and gig without an amp, or do you want to continue to use your amp, but just with the added control over your DI'd sound at gigs?
If you want to run without an amp (or alternatively an FRFR rig), then units like the Helix, Kemper, AxeFX & Headrush will do the job admirably, give you tons of scope regarding effects, routing options etc., etc. Even units like the HD500X or the B3n will give you plenty of options.
If you want to run your amp with an effects only board, then something like the GT1B, GT6B, GT10B, B3/B3n would be ideal as well. You're not using them for their amp sims, merely as an effects board. Yes, the GT6B/GT10B are limited if you're wanting to DI, but they do have loads of scope with their effects.
The Bass Fly Rig would also be a great choice, a tried and tested DI, along with effects from a manufacturer with plenty of experience and knowledge in this field. The only drawback is if you want to "chop & change" your effects. AFAIK, there is an effects loop on the Fly Rig, but that's adding more pedals.