depends I think on what exactly you're looking for. I have MoR as well and to be honest i'm not so thrilled with it. I guess this is largely due to the fact i'm still not playing my things in live and the mod wheel plays a MASSIVE role in most of EW's stuff. So if you're thinking of using the mouse like me, not so great.
However if your concern is to get really good electric guitar i'd put my money on Prominy LPC Distortion or it's new cousing Prominy SC Electric guitar
We're looking at gentlement, 60 and 64 gig libraries of pure distortion fury respectively. The former comes with a clean guitar as well for ballads and other such needs, SC is dedicated to distortion.
Priced at 349 or 599 for both clean and distorted LPC
or 399 for SC alone
It's a bit more (about $99 more) then MoR yet I these guitars are far superior to MoR.
MoR comes with few velocity layers, 2 in most cases and 3 in a few (low, high, and then feedback, like when you play a note hard at the end the guitar slides into a screech kind of thing)
Since it also uses the Kontakt 2/3 engine (SC comes with Kontakt, LPC does not), it's much lighter on your PC.
Anyways, I didn't mean to come off as a salesman or anything. If I had known of LPC when I was buying MoR I would have gotten that. The perc section in MoR is pretty sexy i'll give it that, the bass section I have yet to actually use in a song :/.