Hey John, Rand's got your covered on the compact caldera, so ill address your other questions
The SP600 comes with a net sack thats a lil too big. You could always pick up a lid, and rubberband it to the cup to make sure everything stays together in the net sack. As Rand said, single wall is the way to go. You never want to cook in a double walled cup.
I have more sporks/spoons that a person needs, but the one I keep coming back to is this one…
http://www.rei.com/product/745318
I have the BPL version, but they are all pretty much the same. Keeps the food off your knuckles when you're eating out of a bag. Never really found the tines of a spork that necessary since all my food is…well… soupy i guess
Btw heres some links to some lightweight lids for the SP600.
I found the cheap recycled beer can ones plenty durable (1st link below)
http://minibulldesigncult.webs.com/apps/webstore/products/show/1237390
http://minibulldesigncult.webs.com/apps/webstore/products/show/1232015
good luck!
