preamp or no? if so, which one?

hey guys.
i just started looking for a preamp and am looking for some guidance.

so far i have thiel 3.5s and a classe ca-200. my only source will be a cd player, which i have yet to purchase. i usually listen to live concert recordings done with mics, not from the soundboard. the recordings usually have warmth and capture the ambience of the room, so i don't really want to add anything to the sound.

i guess my first thought is, do i even need a preamap?
should i use a cd player with a volume control, or can a separate volume control be used between a cd player without a volume control and the bass eq box (came with the 3.5s)?
i should also add that the eq box doesn't have balanced connections.

if i do decide to go without a preamp, how do i go about impedance matching, and are there any other compatibility issues?
how would the eq box affect matching the components?

finally, i'de like "cost effective" solutions, if possible. i have the speakers and amp that i will probably hold on to for a while, so it doesn't bother me to leave some room for improvement in the preamp/cd player areas. i have nothing against upgrading these components later.