Thanks for the info guys. Yeah, I'm not taking advantage of the 64 bit OS, but after running the 32 bit OS for a year initially (since the beta) I decided I might as well try the 64 bit OS before I upgraded. In fact, I've been running W7 for 2 years now, 1 year with each 32/64 bit, and they both run the same even with 2GB of memory. I was curious how drivers and software would play with the new 64 bit OS and for a year it hasn't been a problem at all.
I have an Asus A7n8X Deluxe with 2GB of DDR2. I theoretically CAN add another 2GB (if I drop timings), but it wouldn't be worth it. Definitely do the upgrade. I will check out Newegg, but being in Canada it might not be worth it (will check anyway).
Initially CS4 was paging a lot but I lowered the amount of memory used by PS to 30% last year, and it's been running nice and smooth ever since. I'm sure it's still paging, but I routinely stitch together 20-100 picture panoramas without many problems (using 10Mp , 16 bit Tiffs from Raw ) I just do something else while it's stitching, like surf the net or watch some TV.
I like the 3 year warranty and I never overclock, so an included hsf is definitely all I need (and less hassle for me).
Sort of slightly off topic, are there any i7 motherboards out there that support USB 3.0, SATA3 (6Gb), AND full speed PCI-Express (x16)? Most of the ones I've looked at say you have to throttle down the video card slot if you want to use USB 3.0 and SATA 3 (more of a futureproof question).