I remember the rep from VTEngines who posts on this website saying that with their mild street cams you could use stock valve springs. I'm not sure about the modmax cams though.
As long as the lift is about stock then the stock springs should work fine. You need aftermarket springs when you increase the lift above stock, and that is prety much it. Maybe if teh cam had a radical lobe on it springs might be needed, but I doubt stage 1 cams would be like that.