Hi Fr4c. Thanks for the review. It really helped me make a decision. I was also seriously considering a Vaio Z and the new 15" MBP. What it came down to was identifying the Pros/Cons of each laptop, and then seeing which set of Pros really fit me more.
Equal in:
Processor performance
Memory
Price
Vaio Z - Pros:
Lighter, smaller
Better graphics card
Ability to switch between the graphics cards
MBP 15" - Pros:
Better display
Better battery life
Better trackpad
More OS options
The main appeal of the Vaio Z to me was the size. I currently own a 3 year old MBP 15", which I love. But I've taken it with me traveling from time to time and I noticed it is somewhat big and clunky and heavy. As a power user and a gamer, I will use the graphics card to the fullest. I actually really like the ability to physically switch between integrated and discrete graphics. If I'm traveling and I switch to integrated and force out the longer battery life. I'm a little hesitant to use automated software controlled switching. Apple is using their own software, and I've read mixed reviews on it. Since this is very new, I'm wondering if this will be a problem on the Windows side, and if Nvidia or Apple has a driver that does the equivalent switching. I've also read mixed reviews on Nvidia's Optimus software. I'd really like to have complete control of the switching, which the Vaio Z can offer.
The main appeal of the MBP 15" is better design. As I said, I already own a 15" MBP, and the screen is great. I tried out the the keyboard and trackpad in the Apple store and they're good (although I kind of prefer the old keyboard that my MBP has). The aluminum unibody is so nice. Plus Apple does summer promotions where they throw in a free iPod touch.
So now that I've listed their Pros, I need to see which set of pros are more important to me.
The Vaio Z is smaller and lighter, which is great. But now that I think about it, I don't actually travel that much with my computer. I might go on vacation one week in a year, but I may or may not bring my computer. I live at school, but from time to time will visit home. I might use my computer in different rooms. Basically the smaller footprint and weight is a plus that I don't really need. Having an extra 2 pounds won't really hinder my use of the computer. The benefit for having those 2 extra pounds is a much better screen and battery life.
The keyboard and trackpad don't really mean much to me. I tried the Vaio Z keyboard in a store, and it was fine. The MBP one is better, but it's not the deal maker. I usually have a mouse with me, but if I'm truly mobile, I won't be doing something that requires a super accurate trackpad. The Vaio Z trackpad isn't a deal break for me.
So basically the only reason I would get a Vaio Z is because it's smaller, and has a better graphics card. But after reading your review, it seems the graphics performance is basically the same. And the MBP's 5 lbs is still portable enough that it's not a problem. I'm a little iffy on the graphics switching, but there haven't been any serious problems reported. So without a doubt I'm going with the MBP. Looks like once you switch to Apple, you never look back.