Acrylic is more prone to scratching than glass and even UV hardened acrylic will eventually break down when exposed constantly to UVA and UVB at the levels required by beardied dragons (this this embrittlement due to polymer chains breaking down will take several years).
I recommend a front opening (sliding glass doors) timber (plywood or MDF/laminate) tank as the converted fish tanks with mesh tops are very poor tanks for raising / keeping beardies in.