At what point does one decide to replace a bike or repair it? My old bike was bought for a lot less than the money I've put into it over it's lifetime. I've been replacing parts that need to be replaced, and purposely upgrading the components as I go along.
Since my suspension fork is getting worn, I'm wondering at this point if I should change my way of thinking just get another new bike to join up with my last purchase. I would probably get a lower end bike that I would keep as a winter and mud beater.

Anyone's thought/philosophy on this issue would be helpful.