Mokie -
I always recommend that people look to a medical supply company for their day-to-day nebulizer.
Here are things that are important - a strong compressor, a good warranty and relatively fast dispensing times, as well as lower decibels if you will be using it around others or noise bathers you.
I have been using these devices for MANY years, and can tell you that most of the portable, compact, hand-held ones are not going to make you happy long term.
There are both larger and small (quite portable) compressor models depending on your needs. The reuseable nebulizer cups for all of these can be sterilized, and the tubing is replaced regularly, but not washed or sterilized.

The best way to get what you need is to call one of the dedicated medical suppliers during business hours and talk to one of their consultants, who can direct you to the best machine for you. Here are some reliable companies I use/have used with good results: Just Nebulizers (justnebulizers.com) Nebology (nebology.com) Corner Home Medical (cornermedical.com) and Vitality Medical (vitalitymedical.com)
I'm sure others will have their own recommendations for you.