Can I ask why you chose the 5020 over the 30ES? I know sometimes Sony gets a bad rap for product support, but they have been upping their game as of late. The real reason is because I'd like to know under what circumstances someone would choose LCD over LCOS. Brand reputation and product support aside, LCOS is superior to LCD in just about every way I can think of. The two biggies for me are greatest fill ratio vs lowest fill ratio (DLP is in between them; no worry with moire, SDE, etc), and sealed light paths vs unsealed light paths (greater reliability, virtually no fear of dreaded dust blobs). If you're one to keep equipment as long as you say you do, hmm, I'm curious.
For full disclosure: I'm a JVC guy, and Sony is about as close of a competitor as there is.