ST - economic, parts available, great fun
CRT - economic, durable, parts avilable (better than ST1), great fun
X-ray - 1:18? good design..(no other comment)
HB - my friend own one. He enjoy playing it. that's all.
If one of ST and CRT......
I choose CRT though 800-1000 difference in price.
but ST is also a good choice.