McMaster-Carr does do a good job,but you do pay for that.
also ,sometimes they can give you smaller package sizes than a regular industrial distributor.
However in this economy,if you are looking for the pricing,your local industrial distributor will probably be cheaper.
For instance the 3M 7447 pads are $20.88 per box at McMaster-Carr while they are $15.80 at the local distibutor and for a real deal a case of 60 for $37.50.