Olympus PEN-F vs E-PL8 vs E-P5

...and whatever camera you buy will be based on a number of factors such as how the camera looks and feels, your preferred camera body style, IQ, and many other factors.  What's a good camera for one person, may not be so for the next.

As an aside, I don't know why you don't like the GX1.  Hell, I still maintain in pristine condition, both the GF1 and the GX1 and the IQ I'm netting from these ole' girls is nothing to laugh about - they are that good.

I don't have the Pen F - wish I did.  I do have the E-P5 and what a wonderful camera that turned out to be, with a better high ISO capability than "some" of my other brand APS-C sensored cameras - now go figure.  The camera is very good and thus some of the higher prices out there, although I must say, that you can do better than $800.  Here are some on eBay (both new and used).  Even new ones are going for less than $500 - and at those prices, yes, I'd highly recommend getting one.  You'll definitely be happy that you did.

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2060353.m570.l1313.TR12.TRC2.A0.H0.XOlympus+E-P5.TRS0&_nkw=Olympus+E-P5&_sacat=0

Once the Pen-F comes down, I'll focus on getting one of those also, but right now, it's unfortunately too high a price.  Olympus keeps their camera prices high, even when competitors release models that are as good or better than what Oly produced.  But as you can see, it's good to finally see the E-P5 price coming down.

So, I'd enthusiastically suggest looking at the E-P5 and then get some good glass.  I currently am using the inexpensive, yet excellent prime - the Sigma 19 MM on mine and the results are stellar.

Good luck...