Move PVE from old to new hardware

Hello everybody!

I have working stand alone proxmox server:

PVE Manager version pve-manager/2.2-32/3089a616
Kernel version Linux 2.6.32-16-pve #1 SMP Fri Nov 9 11:42:51 CET 2012
MB ASUS P8H67-M PRO
CPU i72600s(2.8Ghz)
RAM 32Gb
Adaptec 6405E RAID10(2Tb) for PVE + RAID 10(2Tb) for backup's
(UPTIME 196 days =()


Now i need change my MB and CPU to ASUS P8Z77 WS + i72600k(4.5Ghz)...i need high clock speed.

How i can do this ? I have only 45-90 min for work.
Should i update proxmox to 3.x first ? I realy nn new version...

I test in lab: i install pve 3.0 on 1st server and move raid to new one 2nd server with new mb and new NIC!!!
and the network has stopped working... so again now to move pve from one mb to anothe new mb
if mb are not the same and pve normal workind on both mb, and should i update pve kernel fist?

THX =)

P.S. i need decision in a week.