I've searched and didn't really find the answer to this... I've just gotten a GK2-500 and I love it. I'm putting it in a SKB 3u with a power conditioner (for chord management) and have a blank spot. I'd like to see if anyone has something that I would "need" to put in that empty space... I've always been an amp / tuner guy. I've played with a 7 band eq and chorus, but just don't need it. Effects are probably out... I play contemporary worship and some country/rock stuff. if y'all would help out the noobies here, what you are using is great, but the why and what kind of music is a big deal too. For educational purposes doncha know! Thanks in advance.