IBM Thinkpad T42 or R51 ?

[dh1t]

In the IBM Thinkpad configuration maze, I found that I can get the T42 (2373JXU) for practically the same price as the R51 (1829LHU). All other features being equal (1 GB RAM, DVD burner, warranty) the main differences are in:

the video card: T42 --> ATI 9600 64 MB versus R51 --> ATI 9000 32 MB;

the hard drive size: T42 --> 40 GB versus T51 --> 80 GB;

the hard drive speed: T42 --> 5400 versus T51 --> 4200 (although according to specs, HD average seek time, Average latency, Cache size and Sustained data transfer rates are identical).

Considering that my main use will be Photoshop 7 and that I don’t intent to play games, should I go with the T42 or the R51? Why?