New 2012 Macbook Pro 13 inch versions

I'm not familiar with the Macbook laptops because I've always used Windows. Due to the design and also to try something different, I consider a Macbook Air or Pro.

So, is the new 2012 Macbook Pro 13 inch in it standard version capable enough to run Adobe Lightroom 4 with 30 Mb Raw files easy?

I mean this version:

13-inch: 2.5 GHz

•     2.5GHz dual-core Intel Core i5  
•     Turbo Boost up to 3.1GHz  
•     4GB 1600MHz memory  
•     500GB 5400-rpm hard drive1
•     Intel HD Graphics 4000

Or do I need a faster one as the:

13-inch: 2.9 GHz

•     2.9GHz dual-core Intel Core i7  
•     Turbo Boost up to 3.6GHz  
•     8GB 1600MHz memory  
•     750GB 5400-rpm hard drive1
•     Intel HD Graphics 4000

And what about this question with the Macbook Air 13 inch?

Thanks