Just a thought you might like to first consider.
In choosing you need to consider the type of outdoor cooking you wish to do. Grills and BBQs , or cooking like in an oven, or both.
If its the former only then an open device is what you need; if the oven type, then it has to have some form of enclosure. Many offer both options so therefore could easily be the wiser choice.
I use a 15 year old american "Pyromid", a folding stainless job that uses a charcoal like bricket, "Heat Beads". This unit is better suited to enclosed cooking but can be used as a BBQ, but spending a lot of time away we prefer not to have too many grilled or BBQed meals.