You know there are different versions on that 1060series: 3gb, 5gb and 6gb Vram. An High and low memory speed versions, while even a complete new 1060 seems to berelased as an answer to the RX590.
Now with the prices are dropped because of the RTX20X0 series and black friday is starting to begin, think the GTX1070 does come very close to your budget and will silence everbody on which Vcard is better.

Before buying any Vcard it is indeed wise to know if the PSU can handle your new card.
Check the website of your PSU brand and use the PSU calculator and to be sure, do also a calculation on a neutral site like a simple one from:
https://images10.newegg.com/BizIntell/tool/psucalc/index.html
or an more complex:
https://outervision.com/power-supply-calculator