Opinion: A/C Replacement Condensor GPD and Parts

So my 2006 A/C Compressor, like many others, has decided to sieze. I am goign to have a mechanic do the work, but looking to get the parts on my own so I can sve some money and still get good parts.

Has anyone heard of GPD (Global Parts Distribution)? The compressor is $242 vs. the Denso at $400. Also, stay awy from Delphi parts, correct? Looking for someone input on GPD and i will just replace everything with those parts....

http://www.autopartswarehouse.com/search/?N=0&Nr=AND(wpn_tl_name:Engine+%26+Drivetrain,wpn_cat_name:Heating%5C%2C+Air+Conditioning+%26+Components,wpn_scat_name:A%2FC+Clutches%5C%2C+Compressors+%26+Components,part:A%2FC+Compressor)

assume I would also need a Condensor
http://www.autopartswarehouse.com/s.../C+Condensers+&+Components,part:A/C+Condenser)

expansion valve
http://www.autopartswarehouse.com/s...ditioning+Components,part:A/C+Expansion+Valve)

and a Drier
http://www.autopartswarehouse.com/s...nditioning+Components,part:A/C+Receiver+Drier)

Thanks!