The etha is a nice gun. I don't have enough experience with it to go into detail, but I can tell ya that I've preferred my Mini over every etha I've shot. I actually prefer the Mini over a Geo I just picked up. The only upgrade that the Mini needs to unlock most of its potential is a trigger, especially since Empire added the Shockwave board. There are some nice upgrade Invert triggers with roller bearings on ebay for less than $20.
In my experience with DP guns, they are hit and miss. You might have gotten a good one in your wife's gun, but there always seems to be a chance of getting a bad apple with DP.