I have three points I'd like to make to you.
1)
I must completely disagree with Chams_uk, "NEW" shouldn't be in your vocabulary at your price range.
2)
It is MY opinion that for under 500$ used you will not hear an audible difference between an integrated amp and an avg receiver. Based on that I'd recommend you stay with whatever you currently use or CONSIDER opting for a 200$ ish receiver that you can at least get the radio on! because you wont be getting radio on any integrated amps! (since you want talk radio!)
slightly above your budget suggestions (since I see none in your price range):
Linn Majik, can be had for 450-550$
Audio Analogue Puccini SE 525-650$
Anthem Integrated 2 525-650$
Sim Audio i5080 700-800$
Classe CAP150 750-900$
3)
based on the speakers you are using, your budget, and your music tastes I would recommend spending ALL of your money on getting new speakers and using whatever it is you use to power them currently.
I am STRONGLY convinced that in this price range speakers have the biggest influence on sound.
I would consider:
Linn Tukan 250-400$
Dynaudio Audience 350-500$
Totem Rokk 450-550$
Jean Marie-Reynaud MarkII 450-550
Vienna Acoustics Haydn 550-650$
These are my opinions based upon my experiences in this hobby.
1)
I must completely disagree with Chams_uk, "NEW" shouldn't be in your vocabulary at your price range.
2)
It is MY opinion that for under 500$ used you will not hear an audible difference between an integrated amp and an avg receiver. Based on that I'd recommend you stay with whatever you currently use or CONSIDER opting for a 200$ ish receiver that you can at least get the radio on! because you wont be getting radio on any integrated amps! (since you want talk radio!)
slightly above your budget suggestions (since I see none in your price range):
Linn Majik, can be had for 450-550$
Audio Analogue Puccini SE 525-650$
Anthem Integrated 2 525-650$
Sim Audio i5080 700-800$
Classe CAP150 750-900$
3)
based on the speakers you are using, your budget, and your music tastes I would recommend spending ALL of your money on getting new speakers and using whatever it is you use to power them currently.
I am STRONGLY convinced that in this price range speakers have the biggest influence on sound.
I would consider:
Linn Tukan 250-400$
Dynaudio Audience 350-500$
Totem Rokk 450-550$
Jean Marie-Reynaud MarkII 450-550
Vienna Acoustics Haydn 550-650$
These are my opinions based upon my experiences in this hobby.