UPDATE! I went to Guitar Center today, plugged into the Rumble 200 and right away knew I was going to purchase it. Much more punch to it than the Rumble 100 which was right next to it. I set all the setting identical and switched back and forth, and the Rumble 200 sounded fuller and louder. Brought it home and played around some more. It seems the tone controls are more sensitive and dynamic on the Rumble 200. Overdrive kicks. The Bright and Vintage tones seem to add more color. And the tone right out of the box is just right on. I have all dials at noon, nothing to tweak and my Fender P Bass sounds like a P Bass should.
I was surprised by the size difference once I got it home. On paper it doesn't seem much bigger, but getting it home it is definitely more significant in size and weight than the Rumble 100. At 34 lbs, it is still light, but you feel the weight difference from the 22 lb. Rumble 100. I may have to get some wheels for it. With that said, compared to my old 70 lb. Carvin Pro Bass 300, it's light as a feather.
As for Guitar Center, I'm not sure what kind of reputation they have around here, but my experiences with them has been great. The 45 day return policy is phenomenal. Besides the Rumble 100, I also had exchanged a Fender Precision Bass. Both times, it was super easy. I took care to repackage the Rumble 100 with all the original packaging and materials (manual, plug). All they did was ask if it was working. That's all. They didn't take it out, inspect it, plug it in, nothing. Same with the bass I returned.
As for the Rumble 200 I purchased, it was the floor model, which I demoed. They took off $20 and gave me 2 years of their Pro Coverage. I was asking for $50 off, but I thought the deal was good so I took it.
Thanks everyone who responded and helped with my decision! I'm 52 and recently got back to playing after not touching a bass for 15 years (life gets in the way). There is so much great advice to be found in these forums and your help is appreciated. Now its time to go play!
Thom