Hi guys: Looking to finalize my purchase on the model x. I am on the fence between the lower battery pack and higher battery pack. I commute about 15 miles each way for work. Is it worth it to get the higher battery pack? Anyone get the 75D and regret it? I talked to my Tesla rep and she said the 75D and 90D are shipping in the same time frame if I choose the 6 or 7 seater. Thanks!