I know there have been threads talking about each of these amps, but I haven't found much info directly comparing the Gallien-Krueger MB 800 to the MB Fusion 800, since the Fusion 800 is relatively new. I'm just looking for a direct comparison in tone between these two specific amps, not the 500 models. Just to give you a reference of what I'm looking for, I currently use a Genz-Benz ShuttleMax 9.2 with a GB Uber 410 cab. My two basses are a passive Jazz and a passive P bass. I'm wondering which GK MB head will provide a tone that's more aggressive and punchy than the ShutteMax, but not quite as bright and edgy as Gallien-Krueger's RB series. I'm very interested in GK's MB 800 heads, but I'm not sure if the MB 800 or MB Fusion 800 will get me more in the ballpark of what I'm looking for. I want to cut through a band mix really well, but with just a little bit less brightness and edge than the GK RB series has. Thoughts, please?