hey, not fair, I thought we were only talking windows proggies!
Naturally, Beirut, if you really want the most you can get from partitioning disks, I would recommend linux. That's how I've always partitioned all my drives. BUT, as with other things linux, things tend to be not extremely user-friendly.

Never tried gparted myself, always been a fan of fdisk (although I think I have played with parted at some point).
However, a weird thing I've noticed is that some of the friendlier ones (i.e., ones with a GUI), are less flexible, and offer you less functionality, than some of the unfriendlier ones. Disk druid is a classic example of that. So it's all up to your personal taste in the end.

So, in conclusion, sure, if you are willing to use Linux, by all means, do use one of the (many) utilities available to partition your disk.