Lisa,
Are you planning to cold smoke, meaning using a smoke generator and leaving the smoker's heat source turned off? The old smokey has a 1250 watt element with no way to adjust it's temp. Thus sounds ok for pork, poultry, beef, etc. but not fish.
I have two big chiefs which are dedicated for Salmon. They come stock with a 450 watt element, non adjustable but I installed a 1100 watt adjustable element in each.
If I was looking for a single smoker that can do about everything, I'd consider the MES40 generation 1.