Does this condenser come with the receiver-drier or any sealing hardware?

Condenser assembly only — receiver-drier and O-rings are separate. You'll want fresh O-rings and a new drier when you swap it in anyway.

Will this work with an upgraded compressor or higher-capacity system?

Yes. Aluminum construction handles sustained pressure and heat from modified cooling systems better than OEM plastic units. Verify your compressor displacement doesn't exceed factory spec range.

Do I need to pull the radiator to get this out?

Condenser removal typically requires dropping the radiator or working around it depending on your mechanical setup. A service manual walk-through before you start saves frustration.