Smallish SSD for Windows XP?

I need to purchase a small'ish (60-100GB) SSD for an old Pentium 4 Windows XP machine. Aside from the 4KB-alignment issue, is there anything I should be aware of?

In the OCZ Vector review by Anand, he states:

"I would still like to see improved 512B transfer performance, but other than Samsung it doesn't look like anyone is really focusing on smaller-than-4KB performance anymore. Even Intel has pretty much abandoned focusing on it with its S3700 controller. I may just have to give up caring about it. Smaller than 4KB performance really doesn't impact most client workloads, it's really the weird corner cases where it would matter. Just don't go off and use any of these drives under Windows XP and you'll be fine."

XP, service pack 3 is pretty big. The old architecture will not allow the faster transfer rates. You can try this and tell us what gains you see, by doing this