Tim, I respect your right to do what you want or feel is best. Personally, I think you are screwing up. You've had too much fun with the Slingshot, and the people you've met because of it. Hey, it's OK to have two toys! I have two Harleys in the garage, one that I ride and one for my wife. As far as reliability goes, mine is 8 years old with 27,000 on it, and hers is 15 years old with 57,000 on it..... NEVER let us down anywhere. I've done all the work myself, and I did have to fix an oil leak on hers last summer. It was the first one.
I would suggest getting whatever 2 wheels you want, and fixing the Slingshot and keeping it. Honestly, we don't ride the bikes much and have considered selling them because of that. The Slingshot is what is used here for us.