I'd go with the Phi. Make sure you can put a full size Lipo under the top plate. I can slide one 5000 on my RDX but one plug is obstructed so you have to tape it at a slight angle. No problem though cause it helps with the balancing.
I think the 415 has a top plate so low it won't accept 5000mah LiPos, so if I were you i wouldn't buy it, among other reasons...
