If your using a single monitor I suggest grabbing at least 2 and once you get keyclone you can use keyclone's maximizer function to place your windows nice and neat one each monitor.

I know your thinking "what good will this do for me lag" I'm not sure what it is but something to do with how wow minimizes multiple instances can cause this lag. This used to be a problem for me when i first started however once i got the second monitor and keyclone up and running the follow lag disappeared.