IMO the single best bass reverb is the Invalid Link Removed It’s $215 direct from the maker and worth every penny. Designed from the ground up for bass and baritone range instruments.
Yes, anything from the Chase Bliss or Iron Ether catalogues are really top tier gear.
Your choice in reverb also depends on what you want to use it for. A bit of long hall reverb is great and at one end of the scale and can be done with simple £50 units. Where as "Carnegie Hall" reverb on the H9 is well into the other end of the scale in terms of depth, magnitude, ambience and clarity. The better reverbs have a clarity to them that allows you hear your bass without added textural mud.
In terms of generic reverb, there are so many offerings these days....it's become the new "overdrive pedal" market.
If you want the best floor pedal units, look to Strymon (Bluesky or Big Sky) or Eventide (H9....buying just the reverb algorithms). Although those are over your budget...they will be the last word in Reverb. The H9 is amazing because it can do so much more and it's a good entry point in a deep well of digital processing. The Empress Reverb gets a lot of love over in the Guitar forums for good reason.
On the next tier there are many dedicated small stompers like MXR Reverb, Tc Electronics Hall of Fame. Most large companies have reverb offerings and they are mostly very good. One product stands out in my mind is the Neunaber Immerse. It's very tweekable and has a lot of great sounding presets. It's also bang on your budget.
At the other end of the scale are the micro pedals (like the Mooer shimmer) and these are great if you just want a little ambience or hall. They don't carry the same level of clarity or control...but are just the tonic if you are looking for small, cheap and "does what it says on the tin" but nothing else. One stand out in this bracket is the Zoom MS-70CDR...a very nice pedal and covers a lot of ground. Not as clear as the top tier stuff and lacks expression or Midi control...but it's a fine product.
If it was my money, I would be looking S/H and towards the upper end of the market.