recommendations for a Xen/NetBSD box?

[Carl Brewer <carl%bl.echidna.id.au@localhost>]

G'day,
After some poking around the wrong list (netbsd-users) I'm after some 
advice re a Xen server I'm about to build up, I want to be able to run a 
NetBSD 4.0 domU and a CentOS 5 domU and maybe a couple of others to play 
with at some point (Opensolaris, mainly), ideally I'd like to use NetBSD 
as the Dom0 but if that's not the best choice, it doesn't matter that 
much - stability is more important for the Dom0 I think than a 
particular allegiance to an O/S version.  I guess Xen 3.0 is the most 
suitable at this time.

I'm looking at using an Intel E8200 CPU (core 2 duo) on a Gigabyte 
GA-G33M-DS2R (Intel G33 chipset) motherboard with 4GB of RAM and a 
couple of 500GB SATA II hdds and I want to run the 500's as a RAID1 
array so that the DomU's don't need to know anything special, and the 
Dom0 (or the hypervisor? I'm still getting to terms with how it fits 
together) looks after the RAID.  In an ideal world I'd like to use a ZFS 
array, but am not sure where OpenSolaris is yet, I'm wary of 
NetBSD-current (this will be a production server for at least one of the 
DomU's) and Opensolaris is pretty much bleeding edge I think, and its 
xen support seems too new to be all that stable, especially if I want to 
use ZFS for a root filesystem.

My reading of the spec for the E8200 says it supports Intel 
virtualisation, does this mean that DomU's will be able to run 'raw' eg 
can I run an instance of a non-Xen aware O/S such as XP etc?

So if you were going to build a Xen server to host a NetBSD 4.0 (i386) 
production (ie: must be stable!) DomU and a couple of others as 
development/play domU's, what would you suggest as the Dom0 and what 
version of Xen should I be looking at?

Thanks!

Carl