So I'm looking to get the SVT-210AV cabinet and I see that the SVT Micro VR head is available as a package deal with the cabinet, but looking at the PF-350 head it appears to be the same price with more wattage. My question is, what is the difference (other than watts and form factor) with the two heads? Does one have different sound than the other? I've never owned an Ampeg product so I can't really compare it to anything I have. It would seem to me that the additional wattage in the PF-350 would be beneficial if I add another 210 cabinet in the future.