Try LM4562 - National Semi got awards for them. Excellent AC and DC spects. New versions of Benchmark use it. It is also dual package. Available in Digi-Key
OpAmp Swap?
I own a pair of Shanling SP-80 Monoblocks. For those of you who don't know these are really integrated monoblocks. As many have found the Amp section is a fairly good design, however the Pre is lacking. Right now these have a Chinese OpAmp (opa2604ap). My question is whether or not I can drop in a Burr-Brown(now TI) opa627ap without any other modifications? Thanks in advance.