Realy need help choosing amp

I got bedroom 9’ by 11’ by 8’ high. It has bed, bookshelf, desk, tv. I’m able to listen to music only on low or moderate volume (or I get evicted). Is it possible to set audiophile grade audio system in my room or I should bite the bullet? I’m newbee to high end (no preferences), on budget (no reference level system please yet). When I went to high end dillers (Denver CO) I was unable to get any real advice –only one salesman told me I got tin ears (it’s possible). I don’t know.
I think I could hear difference between integrated amp (not reference level) and receiver (even high end).
I’ve got now pioneer dvd dv333(?), jbl s310 speakers (should I damp it?), yamaha receiver (took from living room). This system got me hooked on HT but I don’t think it good for audio.
I would like to get hooked to audio but I’m totally lost now. What price range for amp (probably integrated ss amp) to get good quality sound? Could I scrap something from my system (is it worth it)? Made changes to my room?
If system doesn’t sound good it worthless. If too expensive I couldn’t afford it (may be I got tin ears anyway). Question is about budget and equipment.
Any answers and suggestions (or tweaks) will be really appreciated.
Mynewaudio@yahoo.com