I have put together a small amount of data in a spreadsheet here:
Mid-Priced Bass Amp Matrix
If you see any obvious errors, or are unable to access it, please let me know.
Some caveats:
1. I left out some brands simply because they didn't interest me.
2. For "mid-priced", I arbitrarily picked a range approximately between $300 and $800.
3. Para actually means "semi-parametric". None of these amps have true parametric EQ.
4. Don't make any purchasing decisions without doing your own research.
I will try to update it from time to time. If there is an amp that you want to see added, or perhaps a feature column to be added, send me a PM or bump this thread and I will try to get to it.