Need recommendation for amplifier

I'm looking to improve my amp and  basically I'm in the same path as you,  but I need more time and money to pull the trigger.  So just a recommendation,  read about the Nuforce sta 200,  even I'm on your budget also this amp for 500 usd might be my  bet. If you can compare it with the red dragon please report your impressions. 
Regards 

Hi rvpiano,  thanks for your response, so I guess you did heard the Nuforce sta 200 but was not what you expected? 
And if you mind, When you say "sound much better" you mean is not bright any more?

Rvpiano thank you really for your honesty, my speakers have a small tendency to bright so the red dragon is out of my list. might help you, my other options are the parasound a23,  nuprime St 10,  job 225, maybe  Odyssey (reliable issues I have read)