This topic has been battled over for years. My own experience has taught me that converting 48k to 44.1 is just not that beneficial! Besides that, 48k sample rates have revealed artifacts in some VST plugins both during playback and worse on bouncing the track to audio or conversion to 44.1.
Personally, everything I do is 24 bit 44.1 k samplerate and have never had a problem or complaint. I work in a professional capacity doing everything from demos and commercials to full blown orchestra and choir projects. Country to fusion jazz. I have not had one complaint over all this time as to the quality of my work.
I think I will stay at 24/44.1.