It kinda depends on where you want to fly, I think the Q7 along with the Mobula 7 is a great place to start. I have two Mobula 7s and I love them both, one has been modded like crazy. I would first start out with 1S and work your way up to 2S. Be sure to buy some extra frames, props, and batteries. There is a video out there that will show you how to limit the M7's throttle so it is a bit tamer, something you might want to look into.
This info is from another site, but I found it helpful...
Best indoors: Tinyhawk
Jack of all trades: Mobula 7
Best outdoors: Trashcan