Looks like it comes down to Keiko Fujimori of Fuerza Popular or Pedro Kuczynski of PPK. Thankfully the socialist (communist?) Mendoza won't make the cut.
I know plenty of people who support Keiko. I actually met her husband socially this summer and he's a nice guy (I was casually chatting with him and it was only later that my wife pointed out that he is Keiko's husband).
However, there are a LOT of people who will vote against Keiko no matter what. Unbelievably, plenty of highly educated PPK supporters my wife knows were saying they'd vote for Mendoza over Keiko if it came down to those two. The hate against Fujimori runs deep. Personally I don't get it. Sure, there was plenty of corruption in elder Fujimori's administration, but given the enormous good he did for the country it could almost be justified. How much would Peruvians be willing to pay to get rid of the Shining Path if they were to rise again..? How many collateral damage deaths would they accept? A bunch, I bet.
She does seem to lack any real legislative experience, though. She does quite a good job of rallying her party, but I haven't heard of any legislation she's actually passed.
Pedro Kuczynski claims to have the experience Keiko Fujimori lacks, though I don't know enough about his legislative history to know if that is true. He's certainly older than Keiko, anyway
The vast majority of the people I know are supporting PPK, and they're hoping that the anti-Keiko sentiment will be strong enough to win even though Keiko received about 40% of the first round vote. We'll see how it goes, but my guess is the final tally of the second round will indeed be a lot closer than a casual observer would expect.
In the meantime, might I suggest that Pedro Kuczynski print up a bunch of these shirts for his campaign: