I don't play 1. d4 d5 openings and so when faced with 1. Nf3 Nf6 2. c4, I have to make more exotic attempts to get into similar positions, such as the Nimzo English after 2. ...e6 3. Nc3 Bb4 or venture into the Symmetrical English. 

Lately, I've considered the Symmetrical English and specifically, the main line Hedgehog defense. The positions are cramped but with much latent energy. Although I am a bit concerned about what to do if White just sits on the position with his constraining space and doesn't aim for much more than solidity. Moreover, I see that many hedgehogs reach an late middlegame/early endgame quickly after a trade on g2 and a cascade of other trades as a result. Who do the endgames usually favor and how are Black's winning prospects here? My main goal is to use this as an independent winning try and this is the aspect I'm interested in. Will it offer any better winning chances than the Nimzo-English for example? 

Unfortunately I have never played the Hedgehog (but I have played somewhat similar structures in the QID and Sicilian) so I am quite clueless. I appreciate all feedback about it and especially regarding its viability in a must-win situation.

BTW: By Hedgehog, I mean this kind of structure:

1. Nf3 Nf6 2. c4 c5 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Bg5 a6 

White to move