What I'm worried about is that i will have trouble with owners permission and I'll have a read only privileges when I use MAC. This is happening to me with a NTFS formatted HD and I can't seem to solve the issue.It won't matter what drive you get, if its formatted in FAT32, it'll be read on both PCs and Macs.
I have a LaCiE D2, and I haven't had any problems with it.
Which will be your primary system, Win or Mac? What's the size of hard drive? If you use FAT32 you gain compatibility but lose out on the benefits of NTFS or HFS+.
Better to choose any hard drive with a long warranty (3-5yrs not the 1yr joke) and format as HFS+ then use MacDrive v7 to access from Windows side. Works flawlessly on my 2 WinXP and 2 MacOS network with 3 external drives.