Lets get it started in here

OK, so since last Wednesday I've clocked up nearly 55 hours on kotor and at least 15 on TF2 so I figure its about time to start doing something productive. I was hoping Jacob would have posted a thorough  description of his idea by now but regardless, I'm going to start trying to be productive. Based on what I can remember of Jacob's idea, I think the foremost issues we need to consider are the engine and the AI.
The most obvious choices I can think of for the engine are Unity, Unreal and Source.
I thought id start a list of some pros and cons, feel free to add/comment:
PS: I don't know heaps about source, I've played around with some half life levels but that's about it.

Unity		Unreal		Source
PROS	CONS	PROS	CONS	PROS	CONS
fully custom AI	basically no default AI	descent AI	'dumb' AI	good AI	(probably) hard coded AI
full work-flow control	all assets made from scratch	basic fps assets and creator	more limited work-flow control	strong fps assets and physics engine	?
familiar with work-flow and scripting	weird animation management	familiar with work-flow and imporation	troubles with importing animation?	variety of strong asset managers	low familiarity

Just a short list to get started, hopefully it will develop as we come closer to a decision.