After playing my new RG350DX for a couple of months, I decided to step to a Prestige-level HSH guitfiddle in white. I narrowed my choices down to the RG1550M and the JEM505. The JEM won out due to the matching headstock and Edge tremolo, despite the gaping hole.
As it turns out, the JEM505 is very well-made (which is to be expected for a signature guitar), was perfectly set up, and the grip is a rather nifty way to carry the guitar.
Need to plug it into my rig and compare the tone to my RG350DX (with Evolutions) and determine whether or not I need to order another set of DiMarzio pups.
Special thanks to Rich @ IbanezRules for a killer deal.