A mate of mine with that machine went to the non-pressurised PF and swore by it. But he had to upgrade his grinder to match it. The pressurised PF allows you to run virtually any grind and produce something that looks like espresso. Its only when you use the non-pressurised PF that you realise that what you were making before only looked like espresso :o
In short, dont forget the grinder if you go for the non-pressurized PF.