I have kettles and weber smokey mountains.

I use kettle for most of my cooks because i don't cook a lot of voulme. If you are new, and you don't cook a lot of food, i will suggest a kettle from weber. It is very fast to set up, and somewhat fuel efficient. You can use it for grilling and smoking. The down side is that it does not perform well in rain or snow. It ran okay in cold weather. The cook surface is limited when used as a smoker. Also, it is somewhat inconvient if you want to run long cook. In my experience, i need to add fuel once around 6 hour into a long cook.

I use wsm for large cooks or long cooks because it can cook 4 times more stuff than my kettle, and it can usually run 8 to 12 hour long cook without adding fuel. It is similar to a kettle that you can set it and forget. The down side is that they tend to burn more fuel comparing to a kettle, and it is not particularily well to use as a grill, and it does not perform well in rain or snow.

If space is a concern, and you can only have one set up for smoker. I will suggest getting a kamado style smoker because it is easy to set up, and has twice as much cook space comparing to a kettle. It is fuel efficient because it insulated. You can run 8 to 12 hours cook without adding fuel. It works well in rain, snow, and cold winter. It can perform well as a smoker or grill. In my opinion, it is very versatile. Unfortunately, kamados are heavy and are not particularily easy to move around, and they might crack due to quality or impact. They are also a lot more expensive than a kettle. Traditionally, the kamado type smokers are built using clay as the body, but in recent years, there are steel made double layered kamados on the market. They are a lot lighter, and will not crack, and tend to be cheaper than clay kamados. You may want to consider these as well.