If you can find a vintage (pre-1981) Hiwatt in good shape, then yes, go for it. The 100 watt DR103, 200 watt DR201, and 400 watt DR405 are all great bass amps. The DR103 is by far the easiest to find, but has the least headroom. You would want the 4-input rather than the 2-input version of a DR103 because of the headroom.
I wouldn't recommend a new Hiwatt at retail price. These amps don't have near the build quality as the vintage ones.
Reeves Amplification builds an amp that's inspired by the Hiwatt DR201, and it may be your best option among newer amps: [Invalid or Expired Link Removed]
Ampegs have circuits that are very different from those in Hiwatts, so it's going to be a matter of taste.
I finished restoring an old Hiwatt bass amp a few months ago. It is one killer amp. Images are here:
'73 DR405 - a vintage Hiwatt restoration - vintageHIWATTconvention.com