Tar and Move entire system to new hardware

[mark <mark onnow net>]

Looking for some advice.

I have a RHEL WS box I want to move to new hardware.

I would like to tar it all up, move it, extract it, rescue disk, grub 
install, and run it.   Is this do-able?  Better method?

What is the tar command to tar all for such a purpose?  There is an 
exclude proc part is I remember right......

I am moving from a dual p800 on 80 Gig ATA to a 36GIG SCSI RAID 1 
Single hyperthread CPU ( still SMP )

Thoughts?  Recommendations?

Thank you,

Mark