Originally Posted by panabos
. . .
When I got on the KHS Cappucino, I felt like someone had made a bike for me. . . .
Well, there you are then. It's good to get expert advice, but sometimes you have to go with your own judgement.
Originally Posted by panabos
I really like it and my LBS said they can get 18" Marathon tires if I ever need them. . .
You will. Tires wear out. One suggestion, since you've picked an unusual size, keep at least one spare pair of tires, and maybe 3 or 4 spare tubes, on hand. If you rip a sidewall on a tire, or puncture a tube too badly to patch it, you can definitely order replacements through your shop, from Schwalbe, or probably plenty of mail order places. It might be harder to just walk into a shop, though, and replace it the same day.
Have fun!