Not too fussed about McDougall, although he is useful as a winger.
As mentioned before, Kirk is a goal scorer, he has a habit of being in the right position which no othe striker can seem to do. Buchanan's work rate is excellent, off the top of my head he won us a point at Inverness and St Mirren.
Barrowman is probably our quickest forward, and a good substitute to bring on with his energy. With those 3 plus Alex Whittle and possibly Kevin Kyle, we have covered a few essential areas of attacking play.
Clarke is the only forward that I wouldn't hesitate about punting. (not in 'that' way.)