I have a Nexus 30, and I just love it !!! I have had no trouble finding anything for it so far, and today it's cherry... I don't know the difference between the Concept 30 and the Nexus 30, but I have heard that alot of the parts are interchangable. Whoever told you that the Kyosho Concept 30 was cheap, obviously don't know what he's talking about. All Kyosho stuff is top quality, and my Nexus is built beautifully. There is no comparision between the Nitro and the Micro. My Nexus is 100 times easier to fly than the Blade CP, and the tail control is amazing with the Nexus by comparrision. I wish I never wasted my money on a Micro Heli with a tail motor...