Macbook Pro 13" Graphics, A Contentious Issue.

I have a feeling I am about to open a can of worms in regards to the new Macbook Pros, in regards to the forever debated topics for laptops: "Portability VS Power" & "The Hybrid Laptop"



My query is in regards to the new Sandy Bridge 13" Macbook Pro. It has been my previous intention to purchase this machine upgraded to the i7 rather than the i5 for a little more grunt.



My personal requirements are quite simple, I am an engineer. I am using infoworks, CAD and a few more engineering programs in my job (and thus requiring bootcamp, but that's a separate issue). I have done a fair bit of research, spoken to a few fellow engineers about their thoughts on the computer, and the responses have varied, with some saying "make sure to get the next model up with the dedicated graphics" and others saying "I've got the one you're buying and it runs so quickly!" and thus my judgement of late has been a little skewed.



Lo and behold, Youtube.



I watched videos of people playing their high end games, and read reviews on the product (for example, COD4, which I understand uses a lot on the graphics front YouTube - Call of Duty 4: 13 Inch MacBook Pro Gaming (Early 2011) on youtube, and reviews with video benchmark tests on the Macbook Pro 13" with the i7 (Apple MacBook Pro 13" (2011) review from TechRadar UK's expert reviews of Laptops and netbooks).



This poses the all important question for the intellectually minded laptop community in regards to what this computer offers. The resulting answer will hopefully, vastly help not just me, but many other consumers in their decision over purchasing a new Macbook Pro.



Question:

I understand that sandy-bridge technology vastly improves the efficiency of integrated graphics, as well as many other things. Will the Macbook Pro 13" (and thus the Intel 3000 HD graphics) be able to sustain my software? Or should I spend more to go up to the entry level Macbook Pro 15"? Basically, Just how good is this machines grunt?



Please refer to the bench-tests supplied by the 2nd link in this comment, your help is greatly appreciated!