That's a nice bike. Sorry for not bashing! I had a 2003 VTX1800-R. We loved that bike. Balls for days, and just fun to ride. I was burning through floor boards though, so I moved on to my FJR. I had a set of Vance&Hines Big Shots on it. It sounded awesome, and the power difference from stock was amazing.
A few years after I got my FJR, my brother showed up with an 1800C that a friend of his was selling. I took it for a ride, and was surprised how many times I hit the Rev limiter, looking for more pull. Haha...When I first rode my FJR, going over 5k was weird and then not long after, I began looking for a power band above 5k. Funny how we get used to things.
Have fun with that bike. You'll like it! With the V&H pipes, mine was making like 100bhp, and 108lb/ft of torque on a dyno, at 5100 feet of elevation. BTW, that 5 gallon tank is good for around 150 miles, MAX. I was usually looking for a station around 110 miles.