Depends on how much testing you do. I run regression tests on multiple-OS's so I use a lot of VmWare and a high-spec tower with dual 24" screens. The laptop i

Depends on how much testing you do. I run regression tests on multiple-OS's so I use a lot of VmWare and a high-spec tower with dual 24" screens. The laptop is great for demos and coding between meetings, waiting, etc. I prefer and recommend a proper keyboard and mouse. Even the best laptop keyboard will give you CTS/RSI eventually. I do about 80% of my work on the tower with full size keyboard and 20% on the laptop. Of course your mileage may vary.