NX20's weaknesses?

thank you all for the replies. i am not overly concerned with RAW, burst or shot to shot times. I only shoot RAW if I am shooting at high ISOs or if the WB is tricky (but usually WB isn't an issue since setting it manually is very quick with the front button on the NX10). I rarely use burst mode, although perhaps it is a tool I should explore more often as it could probably serve well for many of the things I do. Shot to shot times I am not concerned with; the NX10 has been fast enough in regards to shot to shot times, so assuming the NX20 isn't worse than the NX10, any amount of improvement is good enough for me.

I guess my only hesitation now about the NX20 is if I want to keep investing into the NX system, if I can justify the price, if I should wait since the fall is not that far away from many new product announcements (I can wait), if the articulated screen is valuable enough to me to warrant also buying the built-in EVF which makes the camera more bulky than the NX210. But these are personal questions I shall have to figure out for myself; again, thanks for all the comments

coldamus- yes, I actually used GIMP on my mac a couple years back. but back then I was not as interested in post processing, so since I wasn't using it much and hard drive space was limited, I uninstalled it. Sometime in 2011 I wanted to pick it up again, but when I reinstalled it, for some reason it will not open probably and it seems to be broken. But thanks for mentioning it- I should try again as it was a good program.