"Need"? Maybe not. But I do really dig the Micro VR. Very light, looks way cool, not the highest power amp on the market, but sounds great and is easy to get a great sound. Ditto for the PF350, which is the same preamp + 150 more watts, which I find makes a difference when you're running relatively high volumes. When I use two 210av's, I find myself going for the PF350 instead of the Micro VR for that reason alone. Well, that and it fits in a laptop bag.
Ampeg Portaflex Club #1