IMO, the SXmini is at the top of best mods for 2014...

There should be a steady supply soon.. Hell, I'm kind of expecting YiHi to come out with a compact dual-18650 version soon. I'd be interested solely for the extra battery life, depending upon how compact and comfortable in the hand it would be.. It's hard to beat the Mini in that department.
YiHi does have the market sewed-up with their chipsets.. From what I gather, they refuse to sell chipsets to OEM's, except for
sigelei, Pioneer4U, and perhaps one other.. They also refuse to sell their complete mods to Chinese wholesalers, so I don't expect the prices to drop much soon. I wouldn't trust a cloned YiHi chipset as far as I could throw it, even if they were made available..
As for the ZNA.. Sorry, I traded the one I had months ago. I didn't care for it much.. Not to ruffle feathers, but I find the SXmini much more refined.