The bar that comes with the Baxter (the 'Hoopty'
) looks like a North Road style bar. If this is the case, then I think that canyoneagle was right with the straight bar suggestion. The difference between a straight bar and a North Road is huge (my commuter conversion went: straight-->straight w/bar-ends-->moustache-->North Roads). You will have a much more aggro position just switching to a straight bar, and you can still use the same shifter/levers that come with the Baxter. If you still want a more stretched out position, you can get a longer stem; if you want more hand positions, you can mount bar-ends (which are great for aggressive climbing, btw).