I have the vario-w as well; used to have a virtuoso, but gave that to the maternal unit and regret it, mostly because it's a little irritating going from drip to espresso on my vario (needs to go through about 50g).
I've seen that proline, often considered it as it is a cheap alternative compared to those imports with "ghost teeth". I guess the real next step up would be a used commercial unit.. wonder it it takes to pull one apart and put it in a smaller package.
Not really buying now, just noodling around.