I am a medical student, and as such, already have tons of debt to begin with.
It won't make any difference then to add a little more. :-) Just kidding.
I would suggest you keep your cd player and receiver. Then buy the best speakers you can afford.
Only buy used speakers. Thanks to upgrade mania, very good speakers in very good conditions are routinely available at bargain prices. Stick with Audiogon market place.
At present there is a mint Quad 21L for $800, new 21L for $1000, and mint 22L for $1050. One could do a lot worse than these.
If you don't care about cosmetic nicks, the follwoing also seem like a steal to me:: Spendor 7/1 for $1250 and Spendor SP1/2 for $900.
Good luck.