I have had good luck out of SUBOHMCELL batteries I picked up a couple of them at a shop when I was visiting Phoenix AZ a month or so ago.
It is supposed to be 2800mah 35amp...
I've seen very little information about this battery and I admit I am a complete skeptic about it. It's INR chemistry which makes me think it's a Samsung product.
I highly doubt that subohmcell actually manufacturers this battery and so that leads me to believe it's a re-wrap. As there are currently no 2800mAh 35 amp continuous cells out there (at least that I know of), I just have a hard time with the claims for this battery.
I'm not saying it's a bad battery by the way, only that I don't know enough about it to make a decision if it's a safe battery for
me
OP - VTC4's are a great choice, don't be put off because they are 'only' 2100mAh. They are great batteries. Just make sure you buy them from a reputable vendor and not Ebay.