ErikD,
As your question is about a Dangerous Game Double my choice would definately be WITH ejectors for sure.
Ejector double rifles need a different handling technique though compared to non ejector rifles.
If you learn how to handle an ejector double properly the ejectors are a big asset when dealing with big game up close.
If you cannot handle an ejector double correctly the ejectors will most likely become a big liability.
I have hunted both with ejectors and without on double rifles and thesedays I use 3 different doubles on big game and have a forth which is used mainly on wild boar.
All 4 doubles have ejectors and I wouldn't want to change that for any reason.