You'll find you use low power, wide field views far more often than the high power, narrow field ones because the quality of seeing is less of an issue and there is more to see.

In reality most people end up using 3 eyepieces and a barlow so it is worth giving serious consideration to waiting a while until you can buy your "dream" eyepiece for each focal length. The 35 mm Panoptic is an incredible eyepiece. I can't comment on the image quality of the big Nagler but it is a HUGE eyepiece. There is a chance your telescope may become unbalanced because of it.