I'm using the old BSA style, too.
But the German and Swiss kits are rockers in their own right.
I have a partial kit like this one. The Swiss Trangia
http://www.youtube.com/watch?v=-ELp4gLSuYs
Don't listen to what he says about the handle being hot because he doesn't know how to use it.
It's made for a knife or stick to work in the rings of the handle.
It has to contact the top of the pot.
You can also use the towel you're going to pack in it anyway.
The same is true for the larger pot. A knife of stick in the side ring stabilizes the handle.
I wonder what he thinks the ring is there for.
A padlock?
It will boil more water if your filling canteens to go.
That one and the German kit can be used as double boilers which can be nice.
The weakness is pan frying.
It's a little clumsy for meats and bread mixes.
The tripod hook is a little clumsy, too.
It always seems to be in the way.
I pried mine off and tucked it inside.
I've never needed it anyway. It's just there.
The BSA model gives me two more reflective surfaces.
A little work area for little stuff like screws in my glasses that I don't want falling into the leaves.
Better for opening pine cones.
I make up for the water volume with metal bottles as canteens.
I can make a compass out of the two BSA plates or pot with a magnet and a little water.
It depends on your needs.
They're both good kits.
The BSA just fits the mantra of multipurpose better for me.