You'll be fine with 4.10's. I had mine installed, and I honest to god think the thing gets better gas mileage on the interstate. Granted, it's turning 800 more RPM at 80, but still - the numbers don't lie.
It depends on what kind of driving you do. I would have been perfectly happy with 3.73's, but you with an automatic need a steeper gear anyway. Go with the 4.10's - you'll be happy with them.
If you do a lot of creeping around in town and are looking for better driveability, go with the 4.10. If you do a lot of long distance driving on the interstate, go with 3.73's, if your car rarely sees the strip. It depends on how much you're going to race it.
Many people on here will tell you with an auto, 4.30s or even 4.56s are the way to go with an automatic. Me, personally, I wouldn't go past 4.10.
2016 GT, Perf/Prem, ruby red.
99 Cobra ebony, blk int. #1762/4040
86GT, 88LX 5.0, 95GT
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