Enough of that. Because Windows 8 uses the same kernel as Windows 7 (and Vista) with a minor .x upgrade, you should just use the 7 drivers, as they'll most likely work.
Anyway, I don't understand why you would want to "upgrade" to W8 anyway. It's not good at all unless you have a touchscreen, and the performance gains are very minimal. Just stick with 7, trust me, you'll be happier.
Lenovo have been ok for corporate support from experience - they bend over backwards for us although we occasionally get a bad rep which needs threatening a bit :)
As for HP's other products, their calculators are a bit crappy (made by chinese outfit Kinpo), their printers are shit I agree and their best line of kit (test gear), they spun off to Agilent so the HP brand wouldn't take them down.
After trying to make clear what was wrong with the machine, he told me my warranty had already expired (though my invoice was dated less than a year before that, and the EU requires consumer electronics to come with a minimum of 2 years of warranty). The issue was never resolved, and I performed the needed repairs myself.
Fine example: Sony just replaced my spare TV which was 2 years out of warranty.
As for my ThinkPad, I bought two. If this one fails, I will just get the other one out and use it whilst repairing this with bits from eBay for not much money at all.
* An almost 2 year old dm1z netbook
* A 13" Pavilion laptop from late 2010
* An EliteBook 8540p
* Two older Pavilion notebook, late 2006 and late 2007
And I am very happy with the quality of their machines. The EliteBook is a tank that can compare with ThinkPads in reliability. The Pavilions are sturdy and decent for consumer notebooks. The netbook is brilliant for a $400 device, and has survived multiple drops without any serious marks.
One of the Pavilion's screen broke down in warranty, and HP's support and repair service have been a painful and infuriating experience. I can say the same about any warranty claim I have tried to make as a consumer rather than a professional client (having dealt with Lenovo, Sony and HP).
I wouldn't go near this thing (shitty screen and battery life and subpar compontents for this price level), but I wouldn't say bad things about HP's products in general. Except for their printers, those are just evil.