Congratulations!! Love boxer pups! Need pics soon!
As for the puppy pads, I always advise against them if at all possible. What it does it teach the pup that pottying in the house is ok. Later when a pad is not available, then a t-shirt or blanket will do! Yeah, don't wanna start that problem on top of housetraining! Plus you will have to teach potty training twice - first to go on the pads and then second to get off the pads and onto the outside lawn.
IMO, skip the pads and be very diligent on proper potty training techniques. Every 15-30 mins fo out, after any play go out, after any excitement go out, after every meal go out, etc. If you are diligent now, you will have years of clean carpets and no hidden poop presents.
Oh, and to help in the potty training - feed meals don't let food out with access. You want to get that pup on as much as a consistent schedule as possible. Then you will know their poop and pee schedules without having in between messes!
Can't wait to hear more about the puppy's new life!