Which Turbo Set Up for 03 Civic Si?

I was looking to purchase a turbo for my 2003 Civic Si and was checking into sites that carry them. I came across...
www.CITY-SPEED.com
They have Greddy Bolt On Turbo Kit, Greddy Intercooler Kit, and Greddy BOV - all for..... $3834.97.

Now another site I found was...
www.turbo-kits.com
They have RevHard Stage II Turbo Kit for $3299.00, that includes everything.....Turbo, I/C, BOV, etc......
Which would be the best or should I say best for the money??

Any suggestions?