I don't know about the ease of breeding them, but malawi peacocks are quite nice. 3rd picture in C L O W N K N I F E's post; orange fish with blue iridescence.
My favorite of the ones I posted is the one on the very bottom "White Top Hara" and the one with a red top "Mwanza West", because you don't see too many african cichlids with red on them...and the last one is just cool & I love blue lol...