Had one of the first, liked it but didn't love it enough to be my #1, sold it for the Ace which is the be all end all for me. The Dev really does a lot of things well, like work with your guitar's knobs, but the voicing of it is -very- unique and its EQ is unlike non-VHT amps I've used. This is neither good nor bad but it was not for me in the end.
Try before you buy, you might fall in love or be confused. I spent a couple months trying to dial it in before I gave up on getting it all the way. With the EQ that some of the other models have and/or a loop I think you'd have a great amp.
-P