You need to be more concerned with the Windows 8 and 64 bit compatibility of the tools that you want to use than with X2. If your needed hardware and effects will operate nicely with the OS upgrade you can be pretty confident that X2 will work well for you.
On the other hand, if you need a bunch of older 32bit plugins or don't have Win 8 specific (not bailing wired) drivers for your hardware you might want to hold off on the upgrade for a while. Cakewalk seems to he well ahead of the curve here and a lot of other products need to do some catching up before they operate nicely in Windows 8 and X2. It might be time to consider housecleaning?