I use cgminer, with it I don't need any overclocking utilities etc... I does all of it out-of-the-box, only "thing" with it is that its a console app, but with cgwatcher (which restarts miner if its crashes or cpu gets sick etc..) its golden in windows. Prolly lil more setting up tho (compared to guiminer etc...).
Only thing I had with it is that, because I run crossfire (with 4xxx cards, yeah old I know but best ones are all in the rigs ) I have to start a game, otherwise 2nd card doesnt get undervolted/overclocked core/underclock mem :/ (ULP problem, tried modifying registry etc, didnt work)