Does anyone else use an Aphex Aurel Excitor, mines an Aphex 104 (and may I nip all the obvious

jokes right here please - oh go on then if you must!!!) - I find it really improves the sound of my set up (QSC Amps, RCF speakers, so not bad in the first place) and playing without it just doesn't compare - would be interested in any opinions, how anybody else uses/sets them up etc...are the new models any better?