There will always be something better around the corner. Though when do we round the corner is anyone's guess. Sure the SP5 will be better than the SP4, but the SP6 will beat them both.He love the sp4 too, it was just a consideration to help me spend my money wisely ^^ , i just bought it btw, so happy about it !
I would just get the SP4, and then in couple of years upgrade to the SP6. But that is me.