a flex shot is a certian kind of helix (s curve) its when you throw a overstable disc w/ anny so it makes a big swooping s.
Classic roc is a bit slower than an element or element x. Ive only had one classic roc (its up for trade now) but I would say its more similar to a putter (which makes sense isnt it a beaded XD?) So I would say if youre looking for something similar try a wizard or a stable putter.
Speed demons unless you have a TON of snap will lawn dart for you. IF you want I have a new 174 E Speed Demon for sale trade (9$ or trade for a disc I throw) However if you are a newb I would say stay away from stuff that fast or overstable, try something like a Z avenger, or even a Champ (kc pro) banshee, Z reaper, or something similar. and if you really want the gateway discount (gateway dosnt make many beginner friendly discs) I would say your best bet would be a blaze for your headwind driver, but it would be alittle shorter than the other options. I dont know about the inferno or scream though, they may work, but are still super fast.
Z Pred-ESP Cyclone-Z Force-Z Aftershock-Z Comet-Ion-Pro Rhyno