I was thinking about getting an M-II as well - I had looked at the Kirk Hammett guitars (the guitars, not whether or not he is any good before anyone says anything!), but while they seem to have a decent setup in place they look like they've been horribly drawn on with that finish and juvenile skull and crossbones fretboard inlay. I checked out the M-II and it really doesn't seem very different so I looked on guitarbargains.com, went for the UK option and found they had them for about just under £900 all in all with shipping and things. I've not played one though so I'm reluctant to get one.
The reason I haven't gone for an RG yet is purely because of the finish and thru-neck factor. The only finish I like is the sunburst RGT3020 one, but I'm reluctant to get a thru-neck guitar in case it gets damaged if I travel or something. Replacing a neck for a bolt-on guitar would be annoying, but writing off the whole guitar would be more annoying especially when thru-necks are more expensive. The catch 22 is that with the bolt-on guitars they're not so expensive so much so that if you damaged the neck you might as well just buy another whole new guitar anyway!

I'd also want different pickups to the RG ones so that would mean buying separate Seymour Duncans/EMGs/DiMarzios, whichever I fancied, then paying to have them installed. The M-II though has a cool finish, decent pickups and similar neck dimensions to the JEM/RG series, but I haven't played one and don't know much about them. Can anyone recommend them or is an RG the only way to go?