One of the best values (for anything over $500 that won't fit in a USPS Priority flat rate box,) is FedEx's "Express Saver" 3rd day air service.
It's about 50% more than FedEx Ground (and WELL worth it!) HOWEVER you will not see it on their website's rate calculator, and they won't point it out to you at the Kinko's service desk -- even though there's a checkbox for it right on the airbill form!! They're keeping it a SECRET -- can you believe it!
You get minimal handling, often delivery in TWO days, a 150 lb. maximum weight limit per package. For example, I once shipped two 130 lbs. ea. ARC tube amps in separate boxes, insured for $5K, including overnight return to me of the COD cashiers check for $325! Arrived without a scratch.