I'm looking getting either one of these bikes. I can't decided if its worth it to get the F7 disk instead of the Rockhopper with V-breaks, are the breaks really that much different? I've heard a lot of people talk about how mechinical disk breaks aren't worth it so just stick with V-breaks. From what I've heard it seems the specialized is a better frame? Should I start out with the specialized then slowly up grade parts? It it worth it to upgrade to mechinical breaks or just keep the V-breaks? I can't seem to figure out what bike to get...I'm also open to other suggestions of bikes. I really want to start riding soon!