Beautiful bike--and you'll love the lighter weight and aerodynamic position in comparison to your mountain bike.

Definitely take some time to ride that gorgeous puppy to make sure it fits you properly and you'll be comfortable on it. I mean take it out and put it through its paces. Make sure the reach to the handlebars is OK so you won't have any neck/shoulder/back problems.

Does the LBS have a layaway program, so you could get the more expensive bike if you wanted to wait a little while? Just a thought.