I love freeamp2 for solo stuff, which I use after I record direct with some dirt, not clean. Freeamp's cab sims and reverb seem to really add a cool dimension to solos. I often start with one of the clean or slightly driven presets, and then opt for the brown 2X12 cab sim. There's something about that simple and free VST that just works well with solos, that I can't seem to acheive using SIR with impulses and other VSTs for reverb. They make solos pop out, and me pop wood. Not recommended for rhythms though, it's too airy, middy, and echoey.