Sorry, I couldn't tell the difference between carbon and aluminum. I did like the Ruby Comp 2010 - but the turn off was not the bike but probably the shop - here is a $2400 bike with the handlebars on crooked and the lowest gears for going up a hill needing adjusting.
Yes, I will probably need a 11-28. I think it comes with a 12-27.
They did not have a Ruby Elite - I am going to a different bike shop to try that one out. It is $400 less than the Ruby Comp.
Does anyone have the Ruby Elite 2010 and compared with a Ruby Comp 2010?
So I have the 08 Ruby Pro but if I remember correctly it goes Elite, Comp, Expert, Pro & S-works. The more you pay the better the components and the lighter the weight (material changes). If you live in a hilly area (mountain goat) you will be putting a fair amount of strain on your components as well as needing them to shift smoothly. I personally wouldn't put my grandmother on Shimano 105's. Have the LBS put you on 3 bikes w/ different levels of components and try them out. Doesn't matter the brand of bike or even size--- just pedal and shift gears so you understand what you are paying for. There is a HUGE difference and they should help you understand that. Try to compare a Shimano 105, Shimano Ultegra and a SRAM Force. The local LBS stores may carry more Roubaix's (men's version of Ruby) so you can put the models next to each other and compare weight differences. The Roubaix line follows the same levels i.e Elite, Comp, Expert etc.
The other thing that can drastically change the price of a bike are the wheels. My husband just bought a new set of Reynolds this weekend that cost $1500, so look at the wheels.

Good luck!