Ah, that's cleared that one up!
A very groovy game is Galaga '88 (or '90 if you prefer!)
I prefer the original though.
I never understood why the Amiga didnt get more arcade conversions. Also I am somewhat disappointed by a lot of them - many of which were ST portovers. One only has to look at Rainbow Islands to see what can be done. Don't really remember any quality Amiga arcade conversion shmups except for Silkworm. That was a good conversion too!