Am looking to work with snaps, rivets,  and grommets, for leather work, however, I am unsure of what to start off with regarding tools.  Any recommendations? 
There seems to be the following methods 
- Table top presses with interchangable dies  such as the tandy press at about $150 
- Hand vises such as the Press and Snap Tool at about $129 
- The various setters with dies at about $20 
I am leaning towards the cheapest route until I can maybe find one of the vises or presses used.  Am I heading in the right direction? 
I see there are different manufacturers also.  Do you need specific a specific manufacturer's tool or die to match the snap, or does just the size need to match? 
Also, how do you know what tool or die fits what snap/rivet/grommet?   I see on some of the web stores, the dies and snaps/rivets/grommets are matched. 
Thanks in advance!