Should I just wait??

Like everyone said, you could be waiting for the MMM longer than you anticipate. Besides, if you can afford the Quark/Neu combo now, go ahead and get it. If the MMM system is as affordable as the MM system, relatively speaking, then you could get that too, when it comes out.

I've been thinking about the MMM myself, but I read someplace that the motor is going to be a 2000kv motor. I was excited about it when I read that, but have since then, started running 5S. I'm running that on an 8XL right now, which is a bit less than 2000kv. It's stupid. Way too much power, especially for a track. My next motor is going to be in the 1500-1700kv range for the track. I like running the 5S. Everything is running cooler, so I'm just going to accommodate the voltage.