Well,
Tough question and depends vary much on what you like. I am relatively new to Reps but love watches and I love Breitling's. I am a sucker for the Datora, Navi's and Superoceans but that is just my style. However, these havent been redone for a while and have some big flaws. However, they are still beautiful.
Nevertheless, there are several great Reps and some that are "big". Check site below.
From what I have heard and seen there are flaws in each Rep (which is why they are Reps).
Check out
http://www.rwgforum.net/topic/144449-first-best-rep-breitling-to-buy-recommend/
Cheers and good luck Mate.