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I have two sets of Revolectrix 4S-3300 Mah batteries also for my Vanquish, but they are a smidge too heavy at 13.9 oz.  Even though the 2200's give me less flight time I like how the plane flies with the lighter batteries.  The Rev's are OK, but you really have to keep it "on the wing".
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We'll see how the Nano-Tech's hold up when they get here.  They haven't left Hong Kong yet.  Hopefully they will get some at their US warehouse soon, shipping is $4-ish USPS Priority from there.
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