Jess, i have both a Cossair and an Invader. They both are well built machines but since the day the Aaron Cain #9 roundback came into my life, things changed for colour application.
Ive tried out a few diffrent shaders and tinkered with springs and how to set them up for diffrent techneques and really wasnt getting the results I wanted. An alum NextGen half coil, Sharps Hybrid, one of Glen Flew's Colmans, one of Joey D's infinite irons, a new Carlton, a national swingate, the corsair and invader as mentioned.
They all are good, solid machines, but nothing like the Cain. Long, soft stroke, packs with ease and whips out nicely for me.
Maybe save up a little instead of dropping 2 or 3, hold off and invest it. Thats what I did, and it worked for me. But thats me. Im sure as time goes on and I progerss i may get those others tuned to preform as the Cain, but Im kinda lazy. I just wanna plug in and go.