Help in upgrading new wheels

[S3adrag0n]

I'm thinking of upgrading my 2000 Boxster stock turbo 17" wheels with these 18"
http://www.eurowheelsgallery.com/porscheWheels.html. Has anybody purchase from these guys before (they also have ebay store)? What's your experence if you have.

Other question is... will these specs work without any spacers? According to them, I won't need them.

Rims Size: 18 X 8.0" front & 18 X 10.0" rear
Bolt Pattern: 5 X 130
Offset: 50 mm front & 46 mm rear

Thanks!