Personally I would prefer the option of Amazon allowing me to pick the carrier I want to use rather than simply go with lowest cost. In most cases I value reliability over lower cost.
Since it was an expensive package I chose to pick it up from a Walgreens near my office.
Amazon's shipping is faster, but Newegg/FedEx shipping was a much better experience. It told me who was shipping the package up front and let me choose from several delivery options via that carrier.
The Amazon delivery drivers always harass you as well, phoning multiple times and totally perplexed you have a job and can't be home to pick something up demanding a time for redelivery on the spot which means I have to stop what I'm doing and screw around with my schedule. Either let me enter precise time windows for delivery, get pickup spots or let me choose the shipping company which is the easiest, I don't care about the extra $5 if it means I'm not spending half my Saturday in traffic to get a book.