The x65 uses force tranducers or something like that, essentially the stick doesn't move at all - it senses how much force is applied and translates that into control surface deflection.
Not sure how well it lends itself to WWI, WWII, and Korean sims where gunnery is till a big factor.
CH is really the best choice unless you prefer style over substance. CH has no style - but it gets the job done better than anything else. It's accurate (more so than everything else) and reliable (the opposite of the cougar).
I think CH has something in the works - a new addition to their flight sticks I'm guessing based on activity from other manufacturers.
http://www.ch-hangar.com/forum/showp...6&postcount=10
No details yet, but at least they are admitting they are working on something.