If you do decide to go with the Premiere 4, get a WD20EURS (someone online should be selling the retail package for $100 or less), and use the jmfs .iso to burn yourself a bootable cd and let jmfs copy the drive that's in the P4 to the EURS, and expand.
That will require being able to hook up both drives to a computer at the same time.
"I am altering the deal. Pray I don't alter it any further."
Darth TiVo, 14 February, 2011