so, here's a review of the 7300 from a noob's perspective;
i've got about 250 miles on my trek 7300 and the 2 of us are still in the "getting to know you" stage. i just took it in for it's 1-month tune up and it already feels like a completely different bike than the one i first bought (in a good way).
i love the 7300 except for the shifters. i hate Hate HATE the sram sx-4 twist shifters. the entry level shimano revoshifters on my d-back are much more smooth than the sram. i'm leaning towards upgrading to shimano rapid fire shifters at my next tune up. the dealer will do it for $80.
also, the bike was terrible on my cts at first. a couple of very affordable upgrades and the bike treats me well now. I went with a serfas gel seat and had them move in the shifters and add longer, contoured grips....i went on a 30+ mile ride the other day and cts hardly bothered me.
another down-side, the bike has a deore rear derailluer. supposedly it is top-of-the-line as far as affordable hybrid bikes go. my lbs can't seem to get it adjusted so that, when on the 8th cog, the chain doesn't feel like its about to jump. you can feel the vibration of the chain rubbing. its ever-so-subtle but i'm very nit-picky when it comes to these things. it was doing this on both the 7th and 8th cogs but they were able to fix the problem on the 7th cog.
also, when shifting from the center to the outer chain ring, the derailluer sometimes "grabs" the chain as it leaves the rings and sucks it up into chain as it enters the rings on top. it then "jams." the techs adjusted it and weren't able to replicate the problem. however, i was able to several times while they watched. luckily, it hasn't happened since i took the bike home.
one other shifting problem is with the 4th cog. when i shift to the 5th cog from the 4th, there is sometimes an exceptionally long delay (up to a full turn of the crank).
overall, i love the bike now. i'm just not pleased with my shifting issues. i may take it to another trek dealer to see if they can fix the problem.