Regards Centrelock I have them on my MTB never had a issue with them and there far quicker to fit/take off than regular discs,dont know what the dislike is for them.
For me, the dislike is simply that it's one more "standard" in a world of millions of different standards and it's bloody annoying when it comes to buying/selling secondhand gear.
I've used both centrelock and 6-bolt rotors/hubs in the past, they both work fine, neither is better than the other IMHO. Re taking disc off - not sure I've ever done that once they're fitted other than to fit a new one so the argument of "it's easier to take off" isn't really worth considering cos you do it once every couple of years!
Wheels: I've always used Mavic rims on my existing CX bike, they've lasted really well. Will probably go for Hope Hoops on my new bike though.