I think A6000 is the best APS-C mirrorless value vs IQ right now. I shoot Nex 6 but by many accounts the A6000 has better Jpeg engine, better AWB (even though I shoot raw, the initial colors are important for making the workflow easier) and obviously faster AF (Nex 6 does have a nicer EVF).
I don't have nor used 1650, again going by accounts it's a decent compromise between size and IQ. Sony older kit (1855, still sold with A3000) is supposedly better than 1650, at least in corners. I learned to take criticism of Sony lenses with a grain of salt as every lens that got murdered in reviews had proven fairly decent once I got one. May be I just have low expectations 
If I was buying into a Sony APS-C mirrorless system now and wanted the most versatility for least expense, I'd suggest the following, based on my personal experience:
A6000 body only
Sigma 30/2.8 $150 used, about $200 new - this is the sharpest lens available for Sony, as sharp as Canon EF-M 22/2 per DXOmark. Light, small, cheap, sharp, the only issue is a rather slow cold start time.
Sony 1855 ($70 used if you look hard) or 1650 (buy as a kit). 1855 is supposed to be slightly better optically, but almost double the size (still small, just not a pancake - almost exactly the same size as EF-M 18-55 for EOS M).
Sony 55210 - I just got one used for $150 and it's actually far better than I expected, about on par optically with Canon EF-S 55-250. Sub 5" in length and very light.
Sony 16/2.8 pancake with UWA adapter (turns it into a 12mm). Wide open, the corners are soft, but people rarely use UWA wide open for landscapes. Closed down, it's decent. The lens is tiny and even with adapter hardly takes any space in a bag. I paid $200 for both and if I waited I'd get them for $170.
So, for the cost of body + about $540 you can get a system that covers 12 to 210mm and is very small with decent IQ.
From there, you may want to consider these lenses:
Sony 50/1.8 OSS ($200 or less used) - a great portrait lens, sharp wide open, very good bokeh, stabilized and fast. The low light AF speed is OK on my Nex 6, probably faster on A6000. The good light AF speed is good. It would make an excellent general purpose prime if you can live with focal length.
Sony 35/1.8 OSS - this would make a much better general purpose prime, at $400 new though it's a bit pricey. Optically, close to 50/1.8, and with surprisingly good bokeh for it's FL. For many people, this is _the_ lens they use 90% of time. It would make much more sense for me if it was just a bit wider, say 28mm. It could probably replace both 30/2.8 and 50/1.8 (and cost as much as both of them).
Sigma 19/2.8 - about the same IQ as 30mm (i.e. very sharp), and cheap. I sold mine as I don't quite like the FL.
Sony 18-105/4 - this is the "jack of all trades" that is especially good for video. It's only drawback is the size - it's about the length of 55-210 but bigger diameter, about the same overall size as Tamron 17-50/2.8 but much lighter. IQ is very good, if not as sharp as the f2.8 zooms available for DSLRs. Better on the longer end, with excellent bokeh. $500 used.