I think the vacuum packer needed is dependent on the amount of packaging you do. I buy the premade Vacstrip bags. I just finished going through my first 600 bags. When we halibut fish or do a major salmon fishing trip with a lot of people, we end up with some major bagging. 100 bags gets eaten up quickly. I just ordered another 600. It takes a lot of extra time to cut and seal bags from rolls with this amount of fish to do, on top of cleanikng and drying the fish for packaging. I go through a food saver every couple of years with hard use. I also have a VacuPak.
I think 100 vacstrip bags 11" x 15" are around $40.00 delivered.

The vacstrip bags have a strip that is partially welded into the bags that have dotted welds so it can pull air from everywhere (including the back of the bag) and they work in the food saver too.