I got my X52 back in 03/04,the only problem it ever developed was the twist rudder pot started to spike!
I tried several "fixes" but a set of pedals was the real solution.There's a couple of thing you can do to increase the life span on the X52.
1}the cord between throttle and JS needs adjustment to outside collar,simple spreading with a set of pliers will do.
2} use a powered USB hub and turn off the LED's and turn down the MDF's display.
3} mount the system so it doesn't move around,even just a simple piece of plywood that you can clamp,tape,whatever to your desk. this alone will solve most the problems.
4}Whether you choose the pro or regular x52 the stick will become sloppy after some use,this can be compensated for with the use of shims,I've used cardboard,foam,wood and I'm working on a steel washer ATM.Unfortunately as Mace said the spring perch acts as a bearing/bushing and I haven't come up with a solution for that yet!
It's difficult for me to get CH equipment where I live,must order it from another country,so I can't comment on the differences but from what I've heard a good CH stick,X52 throttle and pedals would be the way to go. Maybe in another 4 or 5 years I'll order a CH stick,by then the X52 will have paid it's dues......