I simply couldn't resist any longer so yesterday I ordered a RAT RC-4. I will be anxiously awaiting its arrival. I also have a Ontario RAT 5 and I look forward to comparing them. I'm pretty sure that my next knife will be a RSK Mk3.

For what it's worth in reference to the discussion of the dispute between RAT and Ontario, I came across this on RAT's web site:

"RAT only guarantees and offers customer service on knives built by RAT Cutlery Company (knives found on this web site) and does not guarantee or offer any customer service for knives that are manufactured by any other company, regardless of the misuse of our trademarks."

It seems that the issue is ongoing.