The specs sound fine.
In my experience, the requirements for LV programming have been dictated more by the OS than LV itself. Of course good programming helps keep the hardware requirements down too....
One thing worth keeping an eye on is the screen size. Sinve LV is graphical in nature, a nicely sized display (without the pixels being too small) is really good. A typical DELL notebook screen with 1600x1200 may be quite hard for some people to use due to the high pixel density, but it's kind of a personal thing. I personally only have a 15 inch TFT for programming. I find it helps me keep my code tidy as the cost of big diagrams is too high. Again, it's a personal thing.
Hope this helps
Shane.
Using LV 6.1 and 8.2.1 on W2k (SP4) and WXP (SP2)