Looking at battery disconnect options....?

I recently bought a car and turns out there is a significant drain on the battery. I spent a few days trying to locate the drain with no luck, and didn't have time/money to send it in as I had to leave for school (and the car is essential).

We ended up installing a simple disconnect switch, so when I park I just pop the hood and disconnect the battery. But having to pop the hood every time I park or anytime I want to start my car is frustrating (and, in some cases, embarrassing).

I've been looking for an automatic disconnect. Currently, PriorityStart seems like my first choice, simply because it's one of the cheaper ones I've seen and it is what I'm looking for. But I've heard it has a tendency to not last very long and/or tends to drain the battery itself if you don't drive your car all that often (I drive roughly once every week-week and a half).

So, I was wondering if there were any better disconnect switches someone could recommend (hopefully around $100 - - not much extra cash to throw around) or if it's better to just stick to popping the hood every time I turn my car off.