1. screen resolution
vertical resolution definitely needs to be at least 900;
most of the Asus offerings are 1366x768 (I have the N81Vp-C1, a Dell XPS M1210, and a couple of older Inspirons).
the 768 is too small - personally I'd opt for a 1080 with a larger form factor (at least 16 to 17);
2. Asus vs HP/Dell (generally)
the N81Vp compared to the HP that I use at work and the Dells that I've had -
Pros - cheap, value for money (good processor + graphics card), quiet, great ventilation
Cons - keyboard has Fn/Ctrl placement, trackpad's click buttons are ridiculously hard to click, keyboard flex, cheap plastic, lots of BSODs after waking from Sleep mode
3. More specifically for photography
-importing from CF card;
when looking for a new laptop I'd be looking for either an ExpressCard slot, a FireWire, or USB 3.0 (regular USB 2.0 is a non-starter)
- i7 720 for processor, a reasonably mid to high GPU, 4 to 8GB of RAM,
and if you have the $$$ - go for SSD instead of HDD.
Asus G73 (powerful machine, but lack of fast ports)
HP Envy 15/17 (more $$$, no MIC input)