It's a good move to get the SH for now.  Wait until the F35 has worked out its major bugs first before we commit billions into a fleet of them.  5 years should give Lockheed enough time to work out the problems.  

With such a costly aircraft, we can't afford to even lose one due to development problems.  I would be the first one to jump on the F35 bandwagon if Lockheed Martin agrees to give us replacement aircraft for free if we were to lose one due to buggy software.