My initial plans involved a tent but unfortunately a decent lightweight one can be expensive (mine was fairly cheap but also fairly heavy) so a few months ago I purchased a second hand DD Tarp for a tenner at a carboot and I love it
It is extremely light which is a major factor imo, packs down nice and small, is flexible in the type of shelter you can make, in fact (at least in my opinion
So whats your choice and why ?