New bike Questions

Hello everyone,

so, the time has come to step up a level in the road bike world for me. Im after a better spec bike and ive got a budget of £1500.
Ive seen the Cube agree 2012 model with the ultegra groupset and im very, very interested.

Im not sure what to go for, the triple or compact. It may be time for me to step up a level in terms of bike spec, BUT, what do i actually need?

http://www.leisurelakesbikes.com/product/cubeagreeprocompactroadbike2012...

This is the model of been looiking at and will more than likely get,but i also have the option of the triple chainset.
Ive also seen the 2012 Cube agree GTC model and it also looks very nice, but im not sure if the spec is good for £1200 ish.

At present ive got a Specialized allez 16 with standard shimano stuff on it, so i can see anything being an improvement.

Your feedback would be very helpful

Thanks

Rikki