Spotted these two, and can be custom made. How does the Nvidia 6600-128MB compare to ATI X700 128MB?

http://www.nexus13.com

Z71V Price: £459.00 inc. VAT Base
config
Pentium M 1.8GHz Dothan 2G L2 750
2048MB Memory
HD 2.5" None- will buy decent brand (or bundled with samsung?) Will the empty HD cage be suppled? Will then fit HD myself
DVD Rewriter
Network None
No Operating System (Self Install)
Price as Customized: £837.00
Western Digital Scorpio 100GB WD1000VE 2.5" 8MB Cache HDD £123.08

Z71VP Price :£999.00 inc VAT Base
config
Pentium M 1.8GHz Dothan 2G L2 750
2048MB Memory
DVD Rewriter
No Operating System (Self Install)
Laptop HD 2.5" (is this primary or secondary HD?) If None is empty module included? Is a HD included for the price?
Price as Customized: £1,009.00

Could a 3.5" SATA drive be used in a SATA external enclosure and used as primary boot drive? (cheaper, faster) if the laptop has SATA connector..

Comments please on both. What is different on the two base kits?

"Supply as parts only- user to assemble" How are laptops supplied as parts?

The z71v and the z71vp is one and the same. Z71vp is the model number as shown on the serial tag. Nothing different about em.