I see powdercoat and spray as being right for different frames and purposed. My Peter Mooney with its beautiful workmanship will always get spray as will the painted portions of my two ti customs. My Raleigh Competition has workmanship that is not a good testament to Raleigh and is powdercoated. Likewise my old Trek workhorse. Both of these bikes are all weather bikes and powdercoat is entirely appropriate. (The two powdercoats are quite different. The Trek is thick and tough. The Competition is thinner, looks better, feels harder and does chip.)
Ben