Kifaru are the shizzz-it for shelters. I own 4 and they are great, but yes, pricey. First was the supertarp and still my go to shelter. It can be rigged as a tarp. tarp deal like shown above, open front shelter, add the annex and its an enclosed shelter, then add the stove and your GTG. Next in my kit was a paratipi, I got this sone one night we had some BAD wind. yes the supertarp and annex worked great but then the wind shifted and I had easy 30MPH gusts coming right into the door, which being an add on deal is not meant for this. MY bag got wet, I got cold, the night sucked. Hence the paratipi since it used the same stove (I was pretty poor at the time). Then I came across a good eal of money and added a sawtooth with med stove and 8man with large stove. WOW. again WOW.
As for tarps. I have used ponchos and the fly from the hennessey hammock. Both work great and as mentioned above the space blanket ground cloth. These things are NICE. Heavy duty, reflective surface, pretty light weight, just about perfectly sized, and still pretty cheap.
sawtooth.
with a new liner, only been used a few times, but I like it ALOT!
The larger 8 man, like a outdoors retreat.
The hammock with hex tarp
Edit to add, size comparison. Left to right, supertarp, paratipi, sawtooth, 8man. then I compressed the 8man/ liner/ net into a med Kifaru stuff sack (which FYI are the best designed sack out there)
The 8man.liner/net on left, a kifaru 0MOB AND 20Slick bag (good for -35f) in the large sack to the right.