Ha ha! I asked this exact ? here not long ago . I went with the plug n play radian, because I wanted to get in the air fast with minimal cost and time invested. Am very happy with the performance! Not sure how the cularis is available (rtf, plugnplay, arf/kit only) but when I was looking into them the cularis was only available as basic airframe and power option sold seperately. So that would have driven the cost up a lot and taken longer to get ready. So, the radian it was! Mine came out of the box with some minor issues, the fuse had been broken and repaired at the factory on both fuse halves. But after flying it, all doubts about quality dissapeared right away. So easy to find thermals, launches incredibly easy, lands like a feather. The plugnplay was ready for launch in 20 minutes, had a precharged 2100mah 3s lipo ready to go, just popped in a standard rx and that was it. Oh yeah, installed horizontal stab, 5 whole minutes there. The cularis is most likely a better plane being full house, but the cost for a simple foamy and build time was more than I could bare. If I had to do it again, I would still get the radian because it suits my flying style of just thermal hunting.