newbie help with speakers and cd players

Hello and thanks for reading this post. I guess I'll ask my easy question first... What exactly is the difference between a CD player and a transport? Now, for my next question (Please be gentle as I'm currently unable to afford Tube based Amps and $5000 Speakers :)...I recently purchased a Harman Kardon AVR55 Receiver and am looking for a good set of speakers to run on it. The models I'm currently looking at are as follows : Snell Acoustics E-5, Mission 773, KEF Q75, Paradigm Legend, and Klipsch SF-2. Also, any input on the reciever would be nice too..btw I paid $179 for it. Thanks for the input