A/C Compressor needed

You are learning why most of us work on our own cars. We have different interests in them than the shops do.

You should be OK with your factory condenser, though AZ is marginal even for the factory setup with R12. A new parallel-flow condenser would give ~30% better heat rejection. One disadvantage is that you can never assuredly flush them, so most replace them if the compressor fails. If your kit came w/ hoses for the factory condenser, that is another argument for keeping it.

Read up on refrigerants and oils before deciding. R-134A is planned to be abolished (greenhouse gas). PAG oil is bad for absorbing moisture and forming corrosive acids if the system ever sits without pressure for months. I read that PAO 68 is the best oil to use today with any refrigerant, and use in my cars. Your compressor will work with any refrigerant, as long as you drain the existing oil. I use Duracool in all my cars, even my 2002 when I had to replace the compressor. But some fear HC refrigerants for various reasons (mostly imagined).