It's good to see the typical consumer response of, "you need a Marshall or an Ampeg..." Pffft.
While both companies do make great amps, if you're on a budget that's not the route you want to take. The POD idea, however, IS the road you should take, imho. Through an amp with such pristine clean tone as your Roland, you're going to get great results with the POD. As Speedemon said, make sure you have the AIR switch OFF!! You'll be hating it if you don't.
I've heard the V-amp, and it basically sucks in comparison to the POD. I haven't heard the J-station, but I know what kind of prices you'll see on those. The POD is a very good unit for a great price.
And as far as mics, I record guitar with condenser mics almost exclusively. Usually stuffed, barely off center of cone. If you like the sound coming out of the cabinet, don't color it with a dynamic mic (yes, I am PROUD heretic). You need the transient response of a condenser mic. That's just my opinion, but you couldn't convince me otherwise.
But don't take our word for it ... use what sounds good to you!!