Yeah it's a tough issue with drummers alright, I should know - I am one!
For me, playing on my Roland TD3 doesn't even come close to my acoustic kit.
I love the expressiveness and feel of real drums and cymbals, something I can never achieve with an ekit. The biggest problems for me are the ekit bass drums and hi-hats. I bought a 12" mesh ekit bass drum to replace the stock TD3 kick pad, simply to accomodate double pedals, but to be honest - they all feel like shit and mistrigger like mofos. I have some cheap acoustic drum shells stacked up which I never use, as I use my primary acoustic kit for gigs etc. But I think I'll just deaden the spare 22" kick, mount one of my triggers onto it and use that with the rest of the ekit instead of the kick pads I have.
The other pain of ekits are hi-hats. Those fuckers just aren't responsive enough unless you shell out for the hi-end ones. For example, the TD3 hats - there's a noticable delay when playing a pattern which has open and closed hats. Best to just edit the changes in your DAW. Cymbal chokes are a bitch too.
But - editing is a breeze!
I've looked into MIDI + real overheads, but to be honest, Superior's overheads sound better than anything I'd capture in my room.
I could post some raw MIDI played from my ekit mapped to default SD2.0 if you'd be interested in studying the velocity info etc.?
But the reality is that