I am concern about the speed of the laptop as I need it to be > fast enough for producing cello music > (say 20-30mins?), occasional heavy photoshop work and price should ideally be at most SGD2000 but I am okay with it being slightly above.
Well I was using my MacBook air for simple 3d printing with Cura so I would say if you get lucky, get a 16mb MacBook air. For now, anything with 16mb ram or more is enough. For a pc though, I would double that.