new and full of questions!

[astivers]

I started riding with my roomate (who is very good and has been riding for several years now) and I enjoyed it for the most part. I really liked riding, but I have been struggling to keep up on the mountain bike I borrowed (which is really too small). I am now in the hunt for my own bike and a road bike at that: ) I am looking to spend about $2,000 and I have been trying a lot of bikes to see how I like the feel. As of now I am down to two different options. I am in love with the specialized roubaix comp or I found a 2005 specialized custom bike for the right price. I don't know if it would be better to get the used bike with all of the high end components or a new one. Please I would love some input from people with more experience!! thanks for the help.

Here is the info on the used bike:
Model:2005 Specialized E5
Condition:Used
Size:54cm
Weight:16 Pounds 5 Oz.

Complete Description:
• Campy Record Cassette, Crankset, Bottom Bracket, Brakes, Front And Rear Derailleurs, KMC X10SL Chain
• Campy Chorus Carbon Shifters
• Mavic Ksyrium ES Wheelset With Ceramic Bearings
• Campy Record Carbon Seatpost
• Specialized Taupe Titanium Railed Saddle
• Ritchey WCS Stem 100mm & Bar 42cm
• FSA Headset
Condition:
• Brand New Bar Tape, Cables & Housing, KMC X10 SL Chain
• The Bike Is Truly In Exquisite Like New Condition
Geometry:
Stand Over: 749mm
Seat Tube Length C-T: 500mm
Top Tube Length Measure Horizontally: 548mm
Head Tube Length: 130mm
Wheelbase: 978mm