I'm exposed to a decent number of these (since we're a dealer for them) and my personal recommendation is that if you're planning on much acro, forget about using any gyros at all - vac or electric.
After about 300 hrs in my -6, my high $$ cageable sigma teks are just about shot. Yeah, I know about "unhooking" the vac, etc.., but no matter which way you slice it the attitude indicator takes a beating during loops, cuban 8's, hammerheads, etc.. and the DG takes a beating during the rolls (which are almost a requirement for every flight).
If it were me (and it kind of is because I can't wait to rip out my Vac system this fall), I'd go with the following:
#1) Trutrak's new ADI (I've seen it wrung out by a couple of rather famous Younkin pilots) and survive beatifully - due to the fact it has no massive spinning weights inside of it.
#2) Dynon EFIS. Also can handle the acro.
Both are available with internal batteries aside from the external electrical system, so both are good choices.
Anyway, the chinese gyros are ok, but anything exposed to acro with a spinning gyro in it will suffer an early death to be sure.
Cheers,
Stein.