Hi cmt489
The best compressors are Bauer compressors you can add the Nitrox if you want. They have several sizes. The best one for you will be Bauer junior 2 electric. You can have a look at
http://bauerair.com/portables.html. There is a contact number and they will help you with any questions. I am a diver myself and worked on several big boats and all of them had Bauer compressors onboard. Just make sure that you service it on a regular basis the last thing you want is trouble when you are doing a deep dive.
Also look at
http://www.bauercomp.com/ as you can choose Bauer Miami.
Good luck and enjoy
Graham