What does DA stand for? Dumbledore's Army?DeathAdder. It's a Razer mouse. I gotta admit, it's pretty sweet. Good tracking, intra-red sensor, good shape, simple but not too simple (2 side buttons, nothing else), on-board memory and backlighting (personally I'd just turn it off though). But like I said, Razer = bad quality control so unless you can afford to buy a new $70 mouse every few months you probably shouldn't go there. And they have a tendency to release unusable crap, not recall it and then have good versions on their own site (this is why the Razer Abyssus and Razer Abyssus 2014 is ALWAYS on sale at NCIX).
I use a rubberdome btw.
/e: Whoops, fixed failquote
EDIT: I might add, Synapse. ><
Anyway, that's enough derailing I think. I use rubber dome. If -Amanda can do Mad Machine DT with rubber domes then clearly your keyboard isn't of THAT great importance. Also, isokasapupuja (ranked #6 on osu!std) uses a membrane keyboard so *shrug*