Either of the above, kwa smgs are very good too- the WE g36 is also worth considering if you can get over the terrible aesthetics.
I've been wanting a G5 for months. I'm still contemplating whether I should swap/ sell my scar for one.
I'd keep the scar until the weather improves to be honest. GHK have an ar-15 coming out later this year too- that would be preferable to me as it's based on a real rifle.
I'd also suggest against going all gas, keep at least one AEG or you're likely to regret it- I did anyway