Kane,
If u're worried about scratches in a low iron glass, then u can forget about acrylic as it will scratch even easier....
As for being a wrasse lover, would suggest going SSB. this way u have no worries about those 'big' wrasse u love that will stir up the sand bed. For a tank this size, if u go regular glass, the green tint will be quite obvious.... many equipments u can change but the tank u can't so u really have to make up your mind on this one.
Do some more reading here in RC and u can see the pros and cons of each materials....
Cheers...