Hello all. First-timer here. My beloved Peavey Mark IV head officially died yesterday after 35 years of punishment and cannot be revived. I'm just a casual player with a couple of bands and I don't have a lot to spend to replace it, so I was looking at the Fender Rumble heads. I play through a single early-’80s EV TL box with a 15-inch speaker. My question - is a Rumble 200 sufficient or should I go to the 500? Thanks for any advice you can give.