You could also juggle your kV/voltage just a bit & achieve the same overall reliability & performance with a single 1400kv motor on 5s and still use the ESC you already have.
19t 1400kv 550 watt 14.4v - I have run 5000mah 5s2p on them
http://www.amazon.com/HPI-Racing-114.../dp/B000LTN048
More 1400's from HK
http://www.hobbyking.com/hobbyking/s...Search=1400kv+
5s packs...
http://www.hobbyking.com/hobbyking/s...5000mah+40c+5s
19t 1400kv 550 watt 14.4v - I have run 5000mah 5s2p on them
http://www.amazon.com/HPI-Racing-114.../dp/B000LTN048
More 1400's from HK
http://www.hobbyking.com/hobbyking/s...Search=1400kv+
5s packs...
http://www.hobbyking.com/hobbyking/s...5000mah+40c+5s
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