I'm going to try the new suggestions when I get home tonight
Re. Illiadis... I did some A/B-ing between it and NubiLE and they where very close soundwise (as in almost spot on with some presets). I just went for NubiLE because I don't like the 'full organ' setup with upper, lower and bass sections. Soundwise Illiadis is a good alternative to Nubi. I also don't recollect one using more cpu then the other.
Disclaimer: I listed AZR3 but actually use ZR1 myself for the same reason.