If suspend/resume is crucial to you, then the T43 (2xxx) and T43p are best, and for subnotebook, X41 because they all run with APM.
If you want a fast, cheap notebook, the oldest T60 (195x) are best because they run SNAP graphics accelerated. Same for subnotebook, X60 runs great.
If you want faster, but with panorama, T61p may be best for widescreen, and T60p for standard screen. These two are the last with working WiFi. WiFi now works with lots more WPA2 access points due to newer port of WPA supplicant.
If you are willing to live without suspend/resume and WiFi and maybe more, you can use some newer notebook.
I sell the above notebooks preloaded with eCS on my website.
http://www.blondeguy.com/ComputersForSale.html
Mensys says Suspend/Resume is coming soon for most notebooks.
