Hello, can someone advice me on upgrading my current rig? Budget around 1500

usage : gaming (mmos, casual games, I don't really play AAA games but if I do, I can settle for medium setting)

Phenom II 945
MSI 770-C75
HD7850
8GB DDR3
WD Blue 1TB
FSP Hexa 500W
Thermalright venomous x cpu cooler
1080p res

Parts that I am considering upgrading is processor and motherboard as both are the oldest part in my rig and to open up upgrade path maybe in 1-2 years.

Processor : i5 4690k or i7 4770k rm920 vs rm900
Mobo : there are a few asrock z97 mobo that fits my budget, gonna need recommendation on this. I prefer quality > features.

is it possible for my current psu to supply the required wattage if I OC the processor and my current gpu, just mild OC at stock voltage? same PSU from HERE


Thank you

OC is just as a hobby so I am inclined to go with 4690k.

About psu, will my current psu be able to handle i5 4460 + 7850 if I choose to go with that upgrade?

Thanks for the advice!