Best Used under $300 2 Channel Amp

WE ARE ON TIGHT BUDGET AND LOOKING FOR ADVISE ON A MIN.100WPC 2 CHANNEL AMP IN THE SUB 300 RANGE.WE HAVE SEEN ADCOM GFA 555,CARVER TFM-25,TFM-35,NAD 2400,2600.I AM A ROOKIE AND YOU GUYS ARE THE REAL PROS,,ALSO NEED STEERING TOWARDS PREAMP ALSO 2 CHANNEL IN THE CHEAPO DEPARTMENT.I WILL BE RUNNING 2 AMP BIAMPED TO MT NHT T5 SPEAKERS IF THAT MATTERS..THANKYOU///MARK