Be more specific. Request either the ATI Mobility 5850 or 5870 NOT the 5830.
Why, you ask?
Because the main bottleneck for the GPU will be the memory. There are two ways you can get rid of that bottleneck.
You can either use a GPU with a 256-bit bus, or you can use a GPU that uses GDDR5 memory instead of the far slower GDDR3 memory.
The 5830 offers neither, and is thus heavily bottlenecked by the memory. Both the 5850 and 5870 use GDDR5 memory and thus hold their own against even higher end desktop GPUs.
I sent them an email and also requested Blu Ray.
By this October, this is what I want to see...
Intel i5/i7 Processor
A Significantly Higher Resolution Screen (1920×1080 Resolution in a High End 15" MBP)
The ATI 5850 GPU (Or any current gen (DirectX 11) mobile GPU with either GDDR5 Memory or a 256-bit Memory Bus)
Updated Display Port With Audio Output Support and/or HDMI port
An improved HD resolution iSight Video Camera
USB 3.0
And here is the upgrade that would be a dream come true and be a knock out killing blow to all other competing laptops...
Apple putting in an 8 GB NAND memory IC. Bought in a reel of 1000, each such card only costs a grand total of $10. Integrated into the spot where the old north bridge used to be, apple could not only have switchable graphics but also hybrid drives on each of its systems. By shutting down the harddrive and using the flash module for most activities could result in vastly faster performance and longer battery life. Put the OS on there and you could be enjoying what, 10 hours of battery life and (instantanous) boot times. I could wait another month for that.
Odds are, we won't see it in the next update. But atleast they might include it in the October update, which I'm guess they're just now starting work on.
I'm guessing the Feb update is finalized and is going to manufacterers, and everyone moved on to figuring out what they want to include in the Oct update.