I have fought with exactly the same dilemma and after much handling in shops, reading of reviews and talking to people on SD and pro stalkers, I came to the conclusion the EL's were not worth the extra 50%. Nearly bought SLC's new but then looked on Ebay and found a pair of 1 year old SLC 8x42 with all the original packaging, warrantee card etc and got them for just over £750! There are a lot of Swaro's on Ebay and if you can identify the age & model, there are some good deals to be had. The SLC do not attract the buying interest of the EL's: I saw an old EL go for over £700 tonight: well rubbed, no covers etc etc
Just be aware that both the SLC's and EL's have changed over the years, the SLC's rather less I believe. An old EL's is pretty much the equal of the newer SLC's and of course doesn't have the Swarovision or whatever.
Swaro's customer service is excellent so even if you buy a rather dog-eared one, they'll rebuild it for a very moderate sum. I bought a Z6i scope which was very beaten up: scratched lense etc and they did a full service including new obj lense and electronics for only £162! It only took about 2 weeks from sending to return and went all the way to Austria for the work. It still looks well worn on the outside but the optics & electronics are as new. What's not to like?!