Just get HDD bays with e-SATA/USB3 and a good place to store multiple HDDs for swapping them around... More space, better transfer rates and lower price. Hell, even the HDD bays are like 20 bucks, even the good stuff!
On the 2000 was a good thing to have 4GB on a Disc because of overall prices on HDDs, but today this is just dumb. Stop R&D on discs and focus on something else... Like MLC/SLC chips.
Cheers!