The 38 is highly versatile and the IQ is quite decent (I may have had a really good copy of that lens). I found it a bit limiting in terms of FOV , though, especially / but not only indoors. Also, for night shooting, the corners were not so good, wide open - the lens needed to be stopped down for brilliant results. The 21 alone was too wide for me, I do not trust the 28p in terms of absolute IQ, for me the 30 is the number 1 wide angle lens in the XCD lineup. Not sure that fits your vision/ needs, but I thought it might help.