Thanks for asking ahead!
No problem - at the resolution you’re wanting, you’ve got two good choices which will both work: either the Plugable UGA-2K-A (http://plugable.com/products/uga-2k-a/) or the Plugable UGA-165 (http://plugable.com/products/uga-165)).
They both output DVI-I (which is both DVI-D compatible, and can be down-converted to VGA with the included adapter), and they both use DisplayLink’s latest Mac drivers (available here: http://www.displaylink.com/support/ma…). DisplayLink’s 1.6 driver series (first released last year) support 64-bit kernels at full feature parity with 32-bit kernel. We’ve gotten no special reports of problems on 64-bit there.
There are a few things to note about DisplayLink Mac support:
* No 3D (Quartz Extreme/OpenGL)
* 4 USB monitors max
* No driver released yet supports the coming 10.7 Lion update … we’re looking for DisplayLink to release an updated driver for Lion, but users will want to wait on Lion until that driver is out.
So there are some limitations, but for getting multiple monitors on Mac, beyond the built-in ports, this is the best solution on the market today.
Hope that background helps - thanks again!