Sounds like Oasis has finally been completely turned to the dark side
. The Maxx struts with minimum lowering setting is going to put you pretty low to the ground. Try that first let the suspension settle for a couple of days and see if you like it.
The rear I would adjust it one outer notch. The speedo is powered by the front left wheel so it may be off a lil, you'll still have a idea of how fast your going.
I recommend for you to go with the 55's all around cause it sounds like you're not going it a whole lot and if you fill in some of the wheel well with tires it will look a lot better. If front tire rub becomes a prob then I'd go with the 45's.
Good luck, you'll love the set-up!
Nick