That 4300 is aluminum, not steel. But this Marin, in the OPs town is steel, and only asking $75.. Those trigger shifters should mount okay. But given the lower price, a pair of thumb shifters and a new quill stem can be added.

http://charlotte.craigslist.org/bik/4312763724.html

I converted this Miyata Terra Runner for about $180. $90 for the bike, $30 for tubes/tires, $10 for bar tape, $15 for stem, Tektro levers $25, and a bag of parts I got at a garage sale for $10, including the barcon shifters. I had the handlebars on hand.