Integrated Amp and Speakers for a teenager?

Hi every one,

After working part-time I was able to put $900 togheter for my first audio system. So, as you can see my budget is very limited. I am lucky enough though to already have a CD, DVD-Audio player and tuner.

But I don't know to what to look for. I know instead how I will use the system: it will be for playing piano (keyboards), and for listening to radio, DVD-Audio and CD's. My favorite music is classical and from time to time jazz (experimental).

I am leaving in a small apartment in a building so I am not interested in loud sound. Even by contrary - I do enjoy listening to low levels.

What I would prefer - a NATURAL sound, as analytical and detailed as posible for this money.

So, which integrated ampifier paired with which speakers?
And because I am young and these money matter for me - I need something that will be as reliable as posible and will serve for the next 5 years (at least)

Thank you a lot