Congrats - think you'll love this driver. 910 D2 standard length is 45" which I am liking much better than the 45.75" in other drivers (thinking of cutting my G20 down).
I've got my 910D3 at 44" even. It's awesome. So much easier to hit than the typical 45"+ drivers. I really suggest going shorter if feasible however I understand that some require/want the swing speed gains of longer drivers.