Congrats on the new bike. For shorts, I had bought hundreds of dollars worth, which isn't hard, and found ONE short that I swear by. My buddy now only wears them too and she is picky! Performance ultra bib short. Wait till they have a sale. I usually pay 1/2 price (around $40-45) and they are worth every freakin penny! Nice silicone grip on the thigh, chamois breathes and is just right, fabric massages you on the ride, and the bib relieves waistline marks.
I finally gave up on thoughts of riding a diamondframe again. My buddies are riding my new recumbent bike and trike and they have NO PAIN! No arm, butt, back, nothing hurts! I can't wait to try it myself. I was forever fighting the above, but changed bike and voila! Good luck to you.