If you're going to upgrade to the Lux anyway, I would suggest you consider the eGo instead. The Lux is a 902, not sure what else it is compatible with . The eGo is a 510, and is compatible with anything else 510 (which is a lot). Other than the threads, the Lux batt looks to have the same features as an eGo. Proprietary is bad when you're looking for options, compatible is good.
I understand what you're saying, but I love Modern Vapor's customer service, they're only 30 miles from my house (shipping is lightning fast), the LUX battery is rated at 900mah, while (I believe) the Ego battery is rated at 650, plus the LUX is so dang pretty!