Look, it all comes down to personal preferences. It's like asking people about their favorite pickup truck. Every platform has pros and cons and people prefer certain things over others: if there was anything out there that was really vastly and definitely superior to everything else then only morons would be using anything else. But that isn't the case. If you asked me I'd say get a GBBR because that's what I enjoy. I'm comfortable working on gas systems and tuning them, I know the shortcomings of the platform, the costs involved, etc.
What you really need to be asking is the real pitfalls of each platform so you know what you're getting yourself into, and make an informed decision based on that along with whichever criteria you started off with.