It’s difficult to say.
The spec on those isn’t very detailed. And even if it were, it’s still a bit of guess work.
Thing to really avoid is: Switchable Graphics
Also newer machines with windows might have a new UEFI secure BIOS, best avoided unless you can be sure it’s possible to disable it.
The next most difficult area is wireless. Though this is now a much improved area.
I use 3 Intel only graphics Laptops and they are fine. All mine will play full screen flash no problem, but I don’t really use them for that. And they are less hungry on battery life than a machine with nvidia or ati
My wife’s Lenovo X220 has Intel Sandybridge Graphics (HD 3000) but I only installed openSUSE-12.1 on it yesterday (just before our dashing off to watch the new Sherlock Holmes movie) so I have not yet been able to test HD video playback with those graphics.
As caf4926 noted, wireless can be a big factor. The webpages you provided have no detail on that. IMHO you need to find out more information there on the wireless BEFORE purchasing. I also can not tell what they have for a webcam. Is the webcam uvc compatible ?
As near as I can tell from those spec’s, none of those laptops have switchable graphics. I note someone claims the Asus X Series X53SC-SX492D Laptop works ok with Ubuntu.
> Any chance of you taking a liveCD (or liveUSB) and booting each of these
> laptops with openSUSE to compare their behaviour ?
I’d second that. I bought a Dell laptop at CostCo a couple weeks ago,
but only after booting the floor model from a USB drive and making sure
the system worked with it.