It's set and forget unless you actually have stuff above 44.1 since it won't resample stuff at the SR you set the shared mode to. If you have a mix of 44.1 and 96 (the USB chip won't do 88.2) then you can just let foobar/WASAPI take care of the SR. If you've got stuff at 88.2 then you'll need a good resampler like SoX but something like 99.9% of digital music is in 16/44 so it shouldn't be that big of a deal to most people.
Also disabling the volume control would be a waste since the whole point of a 24 bit DAC chip was to allow headroom for digital volume control. The Win7 SRC does still suck but the 32 bit FP volume doesn't hurt anything.
The sample rate conversion is not the issue, it's the bit depth. Windows defaults to 16 bit, foobar defaults to 24 bit, so it will resample from 24/44.1 to 16/44.1 and it go's though the sucky windows SRC at that point. It's audible.