UK Based need experianced info on Grow Boxes

Its one of these due to space.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=250370503165

OR


http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=380103936495

Can i have experianced opinions on what kind of light is best for max yeild to a max of 400w either way. It will be on an NFT setup.

Cheese & Grapefruit going in.