I know the Valvoline conv MC 20w50 is pretty highly rated on this site. I used it with no problems, albeit not in a Harley. I'd assume the Valvoline syn MC to perform similarly to the conv, and $6/qt is a good price for even PCMO syn. IMHO, I'd never pay $14/qt for oil unless it was absolutely necessary, there are plenty of good oils in the $3-7/qt range.
2011 Toyota Yaris QSUD 5w30/Fram Ultra
2012 Genuine Stella 4T (Vespa P-series clone) Resolute 20w50/Hiflo Filtro