Some more questions... which one?

I'm not sure that I understand your question. Your options seem to be either to have a system now, or wait for one. My answer will always be get it now.

The Hyperion charger is as good as or better than others that are available with like options. As for the MM, they are good inexpensive escs and will serve well as a back up when the better ones are released. The Feigao motors are only about $70 or so. In the long run, even if you wind up getting a MMM and Neu later, you've still only spent under $200 to have something now and they will serve as backups or as system for a future project.

As for the battery configuration, you really have to know what you're getting into with a 5S setup. I've run 5S in my truggy with a 9XL and it's just stupid. I run 4S most of the time. In a buggy, I'd say that 5S is too much. I'd stick with a 4S setup.

Of course, what works for me, may not be enough for you. Try out the 4S config first. If you go with a Feigao, go with the 8 or 9XL. If you go with the Neu, go for the 2200kv motor. You cravings for speed and quickness should be satisfied.