I owned a NAD 7020E receiver once upon a time in the very early 80s. It replaced a Kenwood 40wpc integrated amp with Kenwood's entry level tuner. Everything was an upgrade but the power - the NAD's 20wpc could barely run my Polk 7bs at loud levels. Fixed the problem by purchasing a Kenwood basic M1 105wpc amp using the NAD as a preamp tuner. Worked great and I think the 7020 should be on this list due to its sound and versatility.