Well,I have a strong powerplant now and all the good radio gear,switches etc after saving up for so long,so a new airframe will easily be outfitted in a few short evenings.
But to get a quality 50cc here,will likely run me about 900-1000$ after shipping and taxes.So it has to be the right one.
I will probably try one of the mentioned airframes,that have build threads and lots of airtime so far.