So does Professional, actually.
XP Mode - unless you have some oddball legacy program like, oh, idk, an old version of SAS statistical software or FlexiSign 7 or earlier, you'll never use it. It emulates a Pentium 1 era integrated GPU (S3 Trio), and is thus more or less completely useless for any kind of gaming, except for games that would be better served by DosBox anyways.
So in essence, you're wasting time, effort, and risking a potentially compromised system for next to no benefit. XP is more or less a dead, pointless OS nowadays, unless you have some sort of specific, esoteric reason to keep it around. And besides, every version of 7 technically has XP virtualization. Install XP in VirtualBox. It actually runs better, as it has proper access to your physical GPU.
tl;dr: Just clean up the bloatware, do your recovery discs up, and stick with 7 Home Premium. Linux is simple enough to add in later, if you find you need it; and on many newer laptops (in my experience) it's a pain to get the GPU working in Linux without manual setup involving command line work.