opinion sought: lvm vs. evms

[Miles Fidelman <mfidelman@meetinghouse.net>]

I run a couple of rack-mount servers, each containing 4 fairly large 
SATA disks.

I'm getting ready to rebuild one of the boxes as a development/staging 
environment.  I'm considering using Xen, with an etch Dom0, and 
wondering what's the best way to manage the underlying disk space for 
maximum flexibility, with a level of reliability.  (Actually, my 
preference would be to run opensolaris with ZFS as Dom0, but that's not 
quite there yet).

I'm torn between using md to raid the disks and running LVM on top of 
that, or using EVMS to handle it all - and looking for opinions on the 
pluses and minuses of each (and, for that matter, opinions on how well 
EVMS is still supported).

Thoughts, suggestions, opinions?

Thanks very much,

Miles