I built one of these with the Mosfet mod,
http://www.buildyourownclone.com/overdrive2.html I cannot say which OD circuit is "best", they all bring something different, plus they're dependent on the player.
My recommendation is for you to find out what'chyo bro digs, hit youtube, search Overdrive pedals and spend a day there.
The only two circuits I haven't played through are the Zen and the Klon ... plus or minus the incessant onslaught of OD builders.
Of all the OD pedals I've owned I really like the Sky (Baby) Blue OD.