Same here.
I supose you guys have finished bashing what you don't like, now someone who likes it might be able to give his opinion
EMG 81 is not the best pickup in the world, but it doesn't by any means suck. It can have way too much gain for some stuff and may sound shit on the neck position, but on the bridge position and with not excessive gain (don't go for 10, something around 6 is enough) it sounds really cool. Of course don't forget to get some mids and don't go for a full set on bass.
That beeing said, 81 will be shit if you want a super distorted and bassy tone. But for a normal gain and with enough mids (COB, Death since Human (before the tone was fucking shit IMO), Sinergy, Metallica the first albums, ... stuff like that) it's a cool pickup IMO. But all my experience is in bridge position, so I can't talk about neck or that stuff. If you have found it cheap on eBay my advice is get it and get rid of the Duncan designed on your RR3 on the bridge. Dunno about neck tho, as I don't use neck p-ups (in fact my guitar doesn't even have one, and I don't use anymore the one on my Ibanez,
).