Comparison questions on PA50 vs PA80 - looking to buy

[fulock]

Hi All,

Im trying to decide on whether to buy a new PA50, or if I should try looking for a second hand PA80.

Firstly, I'd like to know what memory the PA50 has, specs say that it has a SSD (Solid State Disk) - how big (how much memory) is this SSD??
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Spec's say that the PA80 has:

Audio input - with separate gain controls (Mic, Guitar, Line) - does the PA50 also have this??

The MIDI has a PC to Host (PC and MAC Compatible) - is this also the case with the PA50??

How big of a Hard drive (2.5" ATA) can the PA80 Read??

What can the Flash Rom cards be used For??
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From what I can see, the PA80 is a little older, but has a few more features over the PA50, am I correct in saying this??

If anyone can help answer these questions for me it will be greatly apprectiated!!

Cheers!!