Well I got exactly what I was looking for from Proxy. I took my AC30 kitchen-sink preset and:
- Replaced the AC30 block with the free AC30 proxy from @brianwahl,
- Replaced the IR block with the Cali EQ he had in front of it,
- And replaced the boost I had with the LA Studio Comp he was using.
Now my kitchen-sink patch just sounds better. This isn't to say proxy is inherently better than the Agoura AC30, Brian is just better at this kind of thing than I am. Plus because it's an Amp+Cab proxy I can't tweak the amps settings and IR endlessly, so this approach is perfect for me.