Based on your edited list in the OP I would pocket the $200 and do nothing but ride the bike..
Also define wanting to go fast and distance please.
I have a flat bar bike and on flats I average 20mph. I go 40 miles a day, once a week I do 60'ish and every so often I do a century.. I don't have aero bars and I don't have the drop bar end add ons either.
I have bar ends and I would recommend them..
My .02