I think I want to buy a new laptop computer. Can anyone here provide advice, or suggestions on where to look?

The laptop I want to replace is a Dell Latitude D620. Its main issues are weight, heat production, slowness (though probably in part from software issues), inability to sleep or hibernate (buying and installing a new copy of XP might fix this), lack of an HDMI port, and deteriorated battery life. I briefly tried an Inspiron i14z-4000sLV, but it was still kind of slow, and trying to use Windows 8 without a touchscreen was annoying.

I remember reading that it's unsafe to move or jostle a laptop with a magnetic hard drive while it's running, because of the moving parts. Based on that, it seems like it's best to get one with only a solid-state drive and no magnetic drive. Is that accurate?

I'm somewhat ambivalent about how to trade off power against heat and weight, or against cost of replacement if it's lost or damaged.

(Edit: I eventually ordered a Dell XPS 13.)