There a tons of Ancistrus species out their and some are just beautiful. Bristlenose plecos are used pretty heavily with Rift Valley Cichlids, I myself have a few. Mine where just under Bristlenose pleco (well 2 I bought where sold as Ancistrus temminckii from https://www.livefishdirect.com/store.php?fid=302) Any way I have seen pictures of some truly spectacular BNP's especially the starlights, Planet Catfish said they do well in far softer water than I have, and I was wondering how they fare in the hard water that my more general species do well in.