Hi, I work for the NHS in the uk. I can get a new iMac in January with £300 off via my works salary sacrifice scheme, is basically a tax back scheme where they take the payment out of my wages before I pay the tax. Anyway, the dilemma is I really want the fusion drive but the scheme won't let me customise my iMac So do I save £300 or do I buy from apple and add a fusion drive? Thoughts??