I was looking at upgrade for my components and/or bike.

I am currently riding MASI PC1 - Carbon with Sora 9 speed. It was OK, but after a while shifting is not crisp. I am riding daily commute of 17 miles around 19 mph average on mainly flat.
I live in hilly area and my main area of improvement.

I would like to improve my shifting and get a better carbon bike with better components without spending much money.

I found a good deal for Diamondback Podium 5 2013 Model and put it on hold for around $1300

Diamondback Podium 5 - Bicycles and gear for every type of riding - Giant, Lapierre, Santa Cruz, Diamondback, Raleigh, Felt, Fox & more

I need an opinion about it is it a good deal and a good bike? My first concern is a crank (53/39) because it is different from what I have on my compact on MASI, would that affect my riding a lot ?

Also what you guys think about the other components, wheels, frame ?

Thanks.