I'm going to wade in here with a cheap pot-shot. When someone says the movement on FPSes is worse on PCs than consoles, link to a DeFrag video. Such as this one:internetzealot1 said:-snip-
Also, option 3 is the obvious choice in your hypothetical, and falling off shouldn't be a problem if you're any good. I also question your thought that you'll be moving in a straight line when you're using a controller. I think you won't, because you're being shot at, and an irratic move pattern is the best movement pattern for not getting shot. Or something.