I am evaluating the different options for calculating HC+water equilibria with PRODE PROPERTIES,

version 1.2 includes a extended version of Peng Robinson with temperature dependent BIPs,

accuracy on water dew points is good,
normally within 1 K comparing with standards as ISO 18453

this accuracy seems superior to the other packages based on PR which I have evaluated,

for those interested a copy of the software is available from prode com