If you get a chance, try demo-ing the Waves SSL G comp on the 2 bus…The Waves LA-2A might be a little weird. I think it would be difficult to integrate on a 2 bus. You know how with most compressors, the after the needle rises, it falls at whatever rate you set the release at? The 2A has a fixed release of about 60 ms for the first 50%, then a variable release time of 1-15 seconds for the other 50% to release. Its way too slow. I would never set a 2 bus compressor to a release any longer than 1.6 sec. I usually park my bus comps around .2 -.4 sec. with a 1.5:1 or 2:1 ratio. The LA-2A is fixed at 4:1. Another thing about the LA2A on the 2 bus, is that you have to punch it pretty hard to get it to speak. Ideal 2 bus compressors add a lot of glue with only about 2-4 db of gain reduction.
On the other hand, the 2A is fabulous for smashing and crushing vocals, drums, guitars, basses, pianos, and well…just about everything. A common trick to go 3A->2A or 1176->2A. When you get a chance to play with this thing, remember that there’s a lot going on under the hood, even when the needle is barely moving. Waves models the all the circuit noise and analog distortion, as well as the compression.