If it were me, I'd accumulate 14K more Starwood Points, then transfer them to airline miles. Starwood gives a 5K miles bonus on transfers of 20K miles.

Transfer 19K Starwood points = 19K airline miles
Transfer 20K Starwood points = 25K airline miles

Also, you just never know when Starwood points will come in handy for hotel stays. I tend to leave my Starwood points in the starwood account, and only transfer them out (in lots of 20K) when I need airline miles.