are-2 upgrade

[j_erbe]

Hi i have got an ansmann are-2 it is all completely standard everything lol, and i want it faster like as fast as i can lol i am looking at a brushless combo on ebay http://www.ebay.co.uk/itm/2508627322...84.m1423.l2649 this is the link.
i have also purchased a lipo 5000mah 7.4 battery would the be power full enough? will the radio gear be ok? what other upgrades would any1 recommend? any pros cons appreciated? thanks