I've got a Dell XPS M1330 with a 2.2ghz processor, 4gig ram, GeForce 8400M, and a 64GB SSD disk.
I'm primarily doing web-development, sharepoint development, integration (Microsoft BI tools) and biztalk. I use virtual machines for these purposes. I've been using Vista 32Bit up until now but I'm considering moving to 64bit to squeeze that little extra ram out of the box.
I'd like to hear if anyone has been using 64bit vista under the same circumstances and if anything should hold me back. Have in mind that this is the laptop I use at work.
I have recently switched from a Vista 32 bit development machine to a Vista 64 bit development machine, with a quad-core intel processor, and 6gb of ram. THe performance improvements have been quite impressive, and thus far, no "issues" with any development tools that I have been using.