First amp.


Hi everyone!

I'm starting my adventure with high quality audio, but since i am a college student, i just don't have enough money to get a true hi-fi. I'm looking for a decent amp, but don't want to make a newbie mistake, which i would later regret :] Just a really quick question to experts: which of the following ones would you choose?
Denon PMA-700AE
Onkyo A-9155
Pioneer A-10-S
Pioneer A-20-S
Denon PMA-520AE
lukesan
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I like Magnump's response if you are on a budget. For less than $400 one has a great start.
I don't think you can go wrong with any of these choices. I have a 5 year old Pioneer receiver that serves me well for 5 channel. Just make sure whatever you buy can do what you need as far as connections, and buy as much power as you can comfortably afford.
Used NAD, Audio Refinement Complete integrated, something along those lines will keep you in Audiophile equipment affordably.