I prefer the BLNR blue, but prefer the BLRO as a complete package.
GMT piece is one segment that I think Omega clearly lags behind Rolex. I don't dislike the PO GMT (Oreo, Good Planet, and Standard), but I think the GMT Master II offerings are far more striking.
I'm hoping when the PO is redesigned (as well as the 300M) that they up their game with some striking GMT models. It's a complication that I actually would use on a regular basis, and I'd much rather buy one from Omega than from Sinn/Bell and Ross/Farer. It's weird and inexplicable (because I love the BRBO so much), but I'm not a huge fan of the Black Bay GMT for some reason.