For SOIC to DIP adapters, I saw a neat technique on diyhifi of putting the chip on the bottom of a DIP-8 socket... gets the chip 1-2mm closer to the the pins and gives you room on top for stuff like the rail to rail cap, etc.
DIYHiFi.org • View topic - KC7
Look for carlosfm's post (about the 3rd one or so), with pics. His bypassing techniques were what i was going to use for a start if I went to the THS4031/2 chips (100uf Pana FM right on the power pins to ground, etc.).