Of course, if shimmer is a really big deal you should pick up one of these bad boys:
http://www.aquariumobsessed.com/mm5/...gory_Code=SFWM
Check it out, I bet you'd get shimmer with just regular old normal output fluorescents with this thing:
http://youtube.com/watch?v=y5wW0sL_CFk
Another option is the Tunze wavebox, I know you're going with Vortechs but you could slap one on that tank supplementally and get a double wave happening (I think you need at least 8' of tank length to pull it off).
Although I guess the Vortechs could probably pull it off too if they were tuned just right?