I am extremely new to the road scene. By new, I mean I have never been on a road bike. I want to get into riding and will most likely only ride 1-2 times a week at most. I am really into mtn biking and bought an entry level Mtb - Ibex Ignition 2 ($400) and loved riding so much I soon upgraded to a Specialized Stumpy FSR Expert ($2500+) and love it. I ride the stumpy alot since I live 1/2 mile for a great mtb course here in the ATL. I do not mind spending anywhere up to $1500-$1800 on a good road bike but wonder if at my skill level if I will see the difference between a base Specialized Sequoia ($750), Sequoia Elite ($1200), Roubaix ($1300) or possibly even the Cannondale Synapse Carbon 3 ($1899). The main thing for me to enjoy riding and be comfortable riding so I will continue to do it. Some friends and I are doing the MS 150 (100 miler) in about a month so I want to be somewhat comfortable during that ride, but in all reality I will most likely be doing 30-40 miles each time out and just riding, not trying to break land speed records...more for fitness than anything else. Like I said, I don't mind spending $1500+, but it would be nice if I could tell a discernable difference between the base Sequoia and the Roubiax....if not I will jusy go with something less expensive. I realize many are going to say I need to get out and ride them but my LBS don't do that so I will most likely go on reviews and recommendations. Want to pull the trigger this week.....any suggestions?