[Closed] Upgrading my brakes

Think I may now be taking my bike to Canada so I need to upgrade my brakes from the 160mm rotor'd Juicy 5s! The rear one is alright but the front one's had a dodgy loose and creaky lever for ages. Apart from the fiddly bleeding technique and slightly flexy lever, I'm actually quite pleased with the feel and modulation of the J5s. I've seen the Avid Elixir 5 on sale at On-One - http://on-one.co.uk/i/q/BCAVEXIL5/avid-elixir-5-disc-brake

Looking at the 185mm front one and may upgrade the rear to match - can't have mismatched levers 😛 Are they any good or is there something better I could be getting for the money? Are used brakes a good idea or am I better off buying new?