Here my choice would be the 32GB Intel X25-E.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820167013
Simply because it is fast and reliable. And has likely a much longer life span due to the use of SLC storage elements.
This means you get the speed you'd expect plus wouldn't have to worry about writing lots of data constantly.
If you want 60GB+ you might have to lower your speed/quality standards. It would still be faster than most standard HDs but might not be as fast as you might have hoped.
Here a wide variety opens up.
Here my choice would not be any Intel X25-M drives as their speeds are a bit overrated nowadays. 70MB/s write speed is not terribly fast today where OCZ Vertex EX or Summit drives offer 200MB/s.
Granted the Intel drives are good but how much can the OCZ drives slow down and still be faster than 70MB/s? A lot.
The reason why Intel drives are favored is their excellent built-in garbage collection which guarantees that the drive stays as fast as it can throughout its lifetime.
Yet from what I understand the latest OCZ drivers (version 1.3) has similar capability and is not far behind Intel anymore. Certainly not in the realm where 200MB/s will end up slower than 70MB/s.
There are other companies working on agressive automatic garbage collection but from what I can tell these don't necessarily have good driver support for Macs. You might need a Windows machine to upgrade those drivers. With OCZ it's still not perfect but at least you can get by on a new Intel Mac without the need of BootCamp and Windows installed.
Depending on your budget the plain Vertex series starts around $230 for 60GB. Although that drive is not faster than Intel's.
Next one up would be Vertex Turbo at $250.
All the way to the Vertex EX at $660.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227394
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227469
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227442
But shop around you might find it cheaper at places like TigerDirect.com or even Amazon.com.