I can vouch for ESS. I've had my VT2-600 for over a year now and no issues at all. Daily driven including the snowy winter months. I'm close to Toronto in the Hamilton region so if you're down here perhaps I can give you a ride!
2011 M3 ZCP | ESS SUPERCHARGED | AKRAPOVIC EVOLUTION | 20" HRE P40 | BREMBO BBK | B&G SPRINGS