I have been working with Check Point Support on some issues for a client the past few weeks. Whenever I talk to a Support engineer that seems to know his/her stuff I ask them about what they are seeing for stability in the more popular builds. The impression that I have gotten lately is that R75.47 is the one to look at for anyone on R75. It has over 400 fixes included (one of which I could have used three months ago for a VPN pilot using the iOS client).
I even saw this in a Support engineer’s email signature:
Check Point R75.47 is now available.
This significant maintenance release for R75.40, R75.45 and R75.46 includes hundreds of important updates, performance improvements and fixes. In addition it includes also support for the new 13500 appliance.
For more about this recommended upgrade, see the R75.47 Home Page.
I have been running a pair of 21600s on R75.47 in HA using firewall, VPN, IA, and IPS without any issues. Something else worth noting, the release notes state that R75.47 can be managed by older versions: R75.40, R75.40vs, R75.45, and R75.46. In my case I have been using MDM on R75.45 to manage two gateways on R75.47 without any issues.