That sounds great, my blue and yellow tangs do lots of swimming and my coral beauty (oh I forgot that one earlier) is calm as calm can be. Great fish. I just like the pop of the flash or red/orange.No problem. The reason I love a pair of them for you is that hawkfish don't move as much as flame Angels so you won't notice one as much. A pair though - not only a real cool wow factor but more likely to bring red life to your tank.
I've always liked the flame, so it's a huge bummer. Maybe I'll do a good school/shoal of something instead?.!?.