Like Dave said.....Parametric is better IMO. I used the Alesis MEQ230 for a few years and I found that I was always trying to tweak too much. As soon as I went to a para (some cheap POS no name thing that wasnt noisy) I basically scooped it and left it alone. I adjusted it to dif venues slightly (after my sound guy kept throwing shit at me to turn the level down).
At the time I was running: ART SGX/LT, Yamaha Thirty112 (left chan) The POS para EQ Zoom 9000, Peavey Studio Pro 112 (right chan) Both amps mic'd.
This was back in 90-92 or somewhere abouts and for the small joints we were playing TBH.... was overkill and too complicated for a drunk guitar player to deal with most times
Im not trying to talk you out of it at all. Carvin makes good stuff for sure. I guess what I'm trying to say is "dont spend all of your time depending on a 2/3 oct eq for your tone. It does help but it'll leave ya with a migraine due to the "it always can sound better" syndrome I fell into.