MIG welding or GMAW is a skill that all serious welders should learn and master. It is an upgrade from the more widespread but inferior MMA welding and is on par with methods like TIG welding in a lot of applications. However, TIG requires more skill to master and the components are more expensive. MIG is by no means a compromise option. It can hold its own against TIG welding and with skill, the quality, and finesse of the finished weld is indistinguishable.
If you are moving from a pure MMA setup, you will need to invest in setting up a proper MIG workstation. MIG is ill-suited to outdoor work, but that is usually limited to windy conditions. It does not mean you cannot have a portable setup. Depending on your needs and field of work, you can opt for smaller MIG welders and accessories that can be carried or towed to the job-site. Or should you prefer a permanent workstation and work with larger projects, you can establish a workshop. This will also free you from the constraints of mobility, allowing for more elaborate setups.
A proper MIG equipped workshop needs a high-quality MIG welder as the centrepiece. There are a large number of brands that are competing for your favours here. The result is that you will often find MIG welders on sale in Australia, particularly in larger cities like Melbourne.
A sale puts the price of the welder at a lower priority, allowing you to look for more features in a welder. To avoid getting overwhelmed, try making a list of features that are essential to you and follow it up with a list of features that you would like to have but are not crucial. This will largely depend on the kind of work you wish to do. With the list in hand, you will find it easier to browse through the stock of various retailers. It is a good idea to consider buying a welder from an online welding supplier. Their sales are more frequent, and they also tend to have a larger inventory than any local supplier.
Remember to pick a brand or model that has a good and efficient service and support network. Similarly, a good warranty policy will protect your investment. Try not to go overboard with your budget, as some are wont to do in a sale. Remember to allocate some funds for accessories and consumables that you will need.