Ah, you made mention of a better guitar making for better songwriting and my mind just went there.
You're better off with the F-30. I've owned two Hot Rod Devilles and a Hot Rod Deluxe. They are prone to component breakdowns and have a shitty drive channel. An average Mesa is twice the amp the best HRD or HRDx is. In addition, Mesas hold their value, whereas the Hot Rods don't and are a dime-a-dozen last time I frequented the Craigslist here in Dallas.
You'll probably be equally happy with either camera. I suggest checking out the dpreview reviews for each one.
The only thing that you need to realize beyond that is that whatever you buy now is probably what you'll buy in the future, due to the lens collection you'll start growing.
I have read the DP review for each one. Most of it was over my head, but I definitely paid attention to the conclusion. But I was hoping for real people who have used it or something similar. Reviews are great, but I like real world experience as well.
One thing I think is funny is when I read that either D80 or XSi took these amazing photos a couple of years ago and now people are ragging on them because of the newer cameras out there, that cost 2-3 times more. I'm pretty sure I'm going to be perfectly fine with either one I choose.
I actually have a sweet deal on an XSi that has a catch. It's the camera, lens, battery grip, and two OEM batteries...with no charger. The seller is looking for the charger but says it may have been lost in the move. My wife won't let me buy it without being able to test it first. Completely understandable.
I have a D80 lined up that comes with the kit lens and a backup lens with the same stats, minus the Vibration Reduction. My wife's ex sister-in-law is a photographer who says to go with the D80.
Ugh.