Why 6N1P-EV ?There are other cheap alternatives like Ultron PCC189, Philips PCC189, 6N23P (rocket logo). Ultron is best out of them but hard to get outside EU. Philips PCC189 is widely available but with very different price range. 6N23P is most easily found and rocket logo is preferred. For example this offer for rocket logo: http://www.ebay.com/itm/2x-6N23P-E88CC-6DJ8-Tubes-NOS-/321152919972?pt=Vintage_Electronics_R2&hash=item4ac634a9a4
And if you listen mostly electronic music, go for Tungsram PCC88, which is also found quite cheap on eBay: http://www.ebay.com/itm/NOS-Tungsram-PCC88-7DJ8-Hungary-70s-Valve-Vacuum-Dual-Triode-Audio-Guitar-Tube-/200937674426?pt=Vintage_Electronics_R2&hash=item2ec8d196ba
As far as I know and read of that stock 6N11 chinese tube is pretty crappy tube, no wonder you don`t get the wow-effect.
Thanks for the feedback and recommendations. I ended up going with that rocket 6N23P in link you posted. 2 tubes ended up costing $25AU delivered, and I figured I can probably sell one locally for $15, as some people don't want to wait.
I pretty much listen to all types of music except for electronic, so it'll be interesting to see if there are any difference. There wasn't any particular logic with going for a 6N1P-EV initially, other than trying to find the cheapest replacement for the stock 6N11 tube.