Matt-screened Dell M6400 springs to mind. It's a huge topic to cover, as I assume you've realised. Lenovo W700 has a built-in calibrator. I would use the W700 as your standard, and go from there. If you're photo-editing for print work, then the most important thing is to calibrate the output device, which is almost certainly CMYK, to the editing workstation. It's true you've got more gamut with AdobeRGB1998 than sRGB, but the main thing is process calibration. If you've not done this before, you'll be quite surprised how dark a room you'll need for a fully-calibrated system: any kind of LED or CFL backlighting has to be turned way down to maximize gamut and dynamic range.