For around $250 the JakPak costs I would simply get a high performance
Goretex Jacket, a high performance
Goretex Bivi Bag and a high performance
Lightweight tarp or basha.
Total weight would be around 2.2 Kg for the 3 items and costs around $285, which compares quite favorably with the JakPak at 1.4Kg and $250 considering the much greater flexibility and all round comfort.
http://www.youtube.com/watch?v=5Ar3nmEn7vMhttp://www.youtube.com/watch?v=G0tHVjbqQKs&NR=1The basha and bivi would fit quite nicely into the rear game pocket of the jacket