It depends on your arm length really.
Because, if you ever compete in Power Lifting competitions, judges won't give you the "down" signal until your shoulders are locked out all the way up on top.
For me, since I have long arms (by my standards), you might wanna try a Sumo Deadlifting position. You know, where your feet are spread far enough apart, so they're only about 1/2 a foot inside (where your shin meets) the end of your loaded bar.
Once you begin your descent down to grab the bar, make sure to look at the ceiling AT ALL COSTS!, and keep your shoulders BACK! They should never overlap past where your bar is lying before you set up the grip. This will not only help preserve your back strength, but it won't compromise your lifting posture, and most of all, it will prevent an injury (once you get into the HEAVY weight area.)
The standard over / under grip...you know how that's utilized correct? Hopefully...
You know, it would be A LOT easier for me to help you out if you could just get someone to snap a quick shot of your full body standing with the bar down on the floor, and you standing there arms down. I could better help gauge your stance and grip options.
Just a thought...
i'm a monster
i'm a maven
i know this world is changin'
never gave in
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i'm the only thing i'm afraid of