Good points. Polars are hard because they are typically only available for boat that were intending for racing, and also because most people look at them for the MAX speeds, which are actually quite rare while racing or sailing. More important is how it does in 4-10 knots.I was looking at polars when I was boat shopping. I was not shopping for racing just trying to avoid getting a dog. I eventually just started looking at handicap ratings. That kind of helps, but I discovered some boats are only fast down wind with a kite.
Using the US Sailing PHRF mean number for the boat is a very good indication of overall performance. Compare the number of the boat in question to a J/boat or Beneteau First of similar length to get a good idea of overall performance.
These numbers don't lie.
The US sailing database of PHRF ratings can be found here:
http://www.ussailing.org/wp-content...Current Base Handicap Class Hi Lo Average.pdf