Dude, was wondering where you have been. I bet you didn't expect to find yourself in the midst of a PC manufacturer/OS debate, eh? Oh, by the way, I love my Dell laptop, LOL. ;-)
No matter what system you decide on, there are lots of good backup options out there - external hard drive and internet based backups. I have an external HD and also use Upline for routine files (pics, etc.). And dammit, back up those bookmarks - that's the easiest thing to do. And email, contact, yadda yadda. Nobody ever thinks about backup until their system crashes. IMO, some systems are better than others, but they are all ticking time bombs. ;-)
By the way, I think you just over-tax your system. ;-) *BOOM*
We missed ya - best of luck.