Any users of the A42JA-VX061V?

With following specs:

- Intel® Core™ i7-740QM Processor (6M cache, 1.73 GHz)
- Genuine Windows 7 Home Premium (64 Bit)
- 14' HD (1366x768) LED backlit
- 4GB DDR3 RAM
- 640GB Hard Disk Drive
- ATI Mobility Radeon HD 5730
- 2-year limited global hardware warranty

I am considering the above laptop vs a Dell. The main question is the ATI v Nvidia debate. Any seniors out there with a view on which is better, or whether there is any significant difference btw the ATI 5730 v Nvidia 435m?

thx