Can anyone compare the sound of an Ashdown ABM500 head to the aguilar DB680 with a power amp such as a Crown XTI-2000? Im looking for a new toy and the DB680 looks like the only interesting preamp that I havn't owned. I have used one once in a store running through the big tube power amp and an aguilar 4x10 cab. I really don't like the big mid scoop of the aguilar DB cabs. I may be looking for something with a clearer top end than the Ashdown. I use a Bergantino NV610 as my main cab and already own a few crown XTI power amps. How do these two compare tone wise?