I sold my RKE 3 years ago to help fund my Apex, was the best decision ever made.
It's a bit of a punch in the gut cost wise for the initial investment, but I've never regretted it for a moment!
Also I've learned many times over in this hobby to just get the best regardless of cost. I could have saved alot of money if I had purchased top of the line in the first place instead of getting middle of the road, not liking it, and upgrading anyways.
I agree on buying the best you can get the first time:
I just went through re-buying a number of things to replace the lesser things I got the first time.