Linux bootloaders give you more functionality I will give you that but the use of the NT bootloader is ideal if you use WinXP most of the time and linux just on the side. You are more likely to tinker with linux and stuff it up, which in the worst case scenario could take out the bootloader making booting up XP a pain in the ass. FDISK /MBR does not restore the NT loader, you have to run Windows XP in rescue mode to repair a damaged NT bootloader and that doesn't work every time. If you've got NT loader as your current boot loader and it is work, dont' fix what ain't broke! If you use the NT loader, once you delete your Linux partitions, Linux is gone for good. If you want to use Linux primarily then I would say yes, a linux boot loader would be good but until then using the NT loader to invoke the Linux loader is your best option.