There's no such thing as too many bikes in my opinion.
I'm lucky to have two, but in all honesty the Rocket is and always will be my second bike. I am the original owner of a 1999 Valkyrie that is my first love on two wheels. I plan on having it longer than I'm capable of riding it and it is in my will (the recipient doesn't have an inkling that it will be theirs when I'm gone). I've had a 1400 intruder and an '05 Midnight Warrior as second bikes until I took the fateful test ride on the Rocket in '07 at the Honda Hoot.
If money was no object, there would be at least one HD and BMW in my collection. I'm too old and too fat for anything resembling a sport bike, but sitting on the newest version of the VMax at the NY Int'l MC show last year definitely got the heart to racing. It felt like it was doing 60 just sitting on it. Can't even imagine pouring the throttle to it.