I am gonna go a different route and try out the new Basssman Hybrid line. I have read lots of good stuff about them and want to give them a try. I am currently running a GK MB800. I like having the extra headroom of the 800 but have never needed the full power. But with that said.... the Bassman 800 is only $200 more for the extra 300 watts. Just curious if there might be any reason not to opt for the 800 over the 500?