This is interesting.
I have a 2box Drummit5. And i say that i never used a VST ever since i got the thing.
The hi-hat thing it is easely doable. 2Box sells circuit boards and magnets as low as 20€, so that you can mod your cymbals. I have modded mine and it works like a charm.
This is an awesome unit. The cymbals work like 3 zones and are dual zone (they have the piezo on the bell, and calculate the distance between the edge swich and the piezo, like posicional sensing), therefore, you have a usefull bell, bow and edge on your hat.
I am quite happy ever since i got mine. It behaves 90% like an acoustic drum.