Best Desktop Workstation 2010 Need A Business Desktop And A Home Laptop. Choose From The Best.?

Need a business desktop and a home laptop. choose from the best.? - best desktop workstation 2010

Model A: Dell laptop Intel Core 2 Duo T8100 2.10GHz 2048MB 120GB DVD + /-RW 14.1 \\ \\ \\ \\ \\ \\ \\ \\ "WXGA Windows Vista Premium £ 560 + VAT

Model B: Futjisu Siemens Laptop Intel Core 2 Duo T7250 2.00GHz 2048MB 250GB DVD-SM 15.4 \\ \\ \\ \\ \\ \\ \\ \\ "WXGA Windows Vista Premium £ 480 + VAT

Model C: Business Workstation: Intel Core 2 Duo E4500 (2.20GHz, 800MHz, 2MB) Windows Vista Business £ 485 + VAT

My father wants a team of companies, and I want a laptop. He said it might be better with the model B, 2 laptops and desktop memory model C is softer than the B model, and is more expensive. I need advice please?