If you are on a limited budget and looking for better sound you might consider a website called Audiogon. I've purchased several units from this site and it helps bridge the gap between high fidelity and quality at a lower cost.
I can't remember the address but you can probably search it on the web and find it. Once there, read the forums and trust the advice of 3/4 of the members and you will probably find twice the quality and reliability as buying new, for less.
There is always the risk associated with buying used vs. warranty, but you know your risk/potential higher fidelity/quality factor better than I.
Learn, don't be discouraged by the fancy's, and spend wisely. That's what we do when we're on a budget. Mistakes will occur, and if you are looking for the best sound on a budget, mistakes must happen.
Also post questions in the appropriate forum.
Good luck.