I've never really kept up to date with the whole world of PSP, however, finding myself wanting to play a couple of games like Crisis Core that are only available on the device, I find myself confused.
I was basically hoping that someone could clear up what exact differences there are between the models; Looking around I see there are 'Series' (i.e. 1000, 2000, 3000) and the individual models within that series (i.e. 2000, 2004, etc).
Can anyone offer an insight into what to look out for? And also, do I need to keep an eye out for anything when considering the firmware? (like do older models not accept newer firmware).