I think it really depends on the individual zoa.....some seem to like lots of light and others need to be shaded.....you could probably take where you have the frags now as a good starting point and try to place the frags in the new setup roughly where they were in the old setup......of course flow will also effect how happy some zoas are....so it may take a bit of experimenting
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260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065, 2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa).
http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here
http://www.vimeo.com/2304609 and here
http://www.vimeo.com/16591694