Got WRC Collection. Am not disappointed in having WRC 6&7 but probably skip 5 until much later.
Snap review... if you're after a rally game then Dirt 2.0, if you're more casual and want to enjoy rallying over the authenticity of the car/tracks then WRC is well worth it. I went from Dirt 1.0 to WRC 7 and found it just a bit more relaxed, so am enjoying it all the more. Limited scope of cars though but living with that.