IPv4 vs. IPv6

im not too update on networking and stuff, after watching a performance evaluations of my 2 CPU Pentium Pro server. i decided a new setup and Server was up for par.

So whats better for a mid range Web Server with FTP capability's IPv4 or IPv6?

also one other question anyone now if there is a free and easer way to set up. i did all my HTML 4 codes by hand, and i really don't want to do that again.

my new server specs are as listed in case you need them.

dual Socket 478's both with 2.99HT Pentium 4.

4 Gigs of Ram

2TB of HDD space(Raided with 4 500GB HDD's)

Intel Pro Ethernet adapter 10/100/1000

OS in current use is Windows 2000 Server.

if need be i will use Linux.