Why not just start with some 25.4mm clamp low rise bars or flat bars? I don't see the point in changing out the stem yet. If you decide to change the stem out in the future the bars will work with it (just be sure to get a 25.4mm clamp stem.)

http://www.universalcycles.com/shopp...p?category=516

http://www.universalcycles.com/shopp...p?category=515