So I'm thinking about a new amp for my NV610 that'll be here by weeks end. So far I like the Aguilar 750 and the gk 2001rb. I haven't played the GK yet, but I played the 750 a few montha ago and enjoyed it. But I didn't really get a shot to see how "dirty" the amp gets. So my question is how "dirty" can the 750 get? Thanks.