I bought the Wheeler FAT "Wrench" (? why they call it a wrench...I dunno...). I got it on sale for $40.00- I forget who from. You'd probably have more diversity getting a 3/8" drive as buxman66 suggested- however the Wheeler comes with various size Torx heads, allen heads, flat head screw drivers and an adapter for a 1/4" socket. 9 pieces not including the adapter. Your standard Phillips head bits, as you'd use in your cordless driver or drill, readily fit the Wheeler.

All in all, I'm satisfied. Measures between 10 - 65 in./lbs. I think if you consider the heads they send with the tool and the adapter, it is a decent "bang-for-the-buck" option. JMO. Best wishes whichever way you decide...
Brian