Congratulations on the guitar order, I hope you will enjoy it for many years.
I have always played Elixer strings, not to say I have not tried many other string manufacturers and gauges, I have. You will eventually find the ones you prefer. My opinion is that the Elixer strings offer excellent tone and last a long time. One thing is for sure if you ask on the forum what is the best you will open up a hornets nest of opinions, doing a search here you will find loads of information on the subject.
The add ons that you plan will offer a way to make your new guitar with bit of personality to it. I like the no pick guard look myself, have you considered a clear pick guard?