I feel the same...It killed me to spend $600 ON MY CAAD8 but not that i rode it for over a month it now is sinking in that a cheap bike doesn't compare and from what i have found out is actually $600 is considered cheap in the bike industry unless you are comparing it to a Dept Store bike...I bought a brand new walmart Hybrid from my neighbour, ended up costing me only $17.00 yeah...Sold it the next day for $100.00...I rode it for about 1/4 mile and said HOLY CRAP it feels cheap...MyCannondale feels like a very high quality bike compared... I am replacing the wheels this week with a new SHimano cassette and added a new Forte Pro XFR saddle and the spending continues....That Trek will give you miles and miles of enjoyable riding....
You did keep the Raleigh right? get it tuned eventually and ride it also sometimes, it will make you enjoy the Trek even more...LOL.