oK--I just got engaged a little while ago and although the wedding isnt for a whiel, the little lady is already starting to not like my bike addiction. I have a GF mtb ( i have never taken ti off road) I bought 3 yrs ago when i got back into cyclign and ride it all the time. I want to buy a new bike and the lady thinks i am wasting my money. How do i justify a $600 bike purchase to her when, as she says, there is nothing "wrong" with my current bike.