My biggest concern with this move is my S2S VPN. I am hoping to keep
that intact.

Current server is a custom built server with IDE drives and two Nic
cards. OLD, LOW memory. Want to do better.

Current options Dell no OS Desktop. Move the drives and cards over.
Reboot and I think just make minor adjustments?

Perhaps a better option is a Dell Thin server the 750 where I can move
to SATA or SCSI. Concern here is that I cannot move the old hardware
over. How would I handel this? Just do a server migration? Then do I
need to reinstall Bordermanger and then redo the S2S VPN? And Access Rules?
I think the Dell server is my best hardware option. I am just concerned
about s2s and rules etc.

Thanks for the advice.