Having just bought two new bikes in the last couple of months, I say go for it.
My husband surprised me with a new Rush, then I saw a Cannondale six13 deal that I could not pass up. I saved up half in savings, the other half I made up for by selling two older bikes and some items around the house. Maybe you could make some extra money by getting rid of some older items to help pay for the bike and keep any quilt or buyers remorse at bay.
Life is what we make it, always has been, always will be. ~Grandma Moses