I'm still hemming and hawwing a bit... I've seen the Sierra listed at only 6.0 oz for the 10/11 while the Integrity is listed at 8.5 and the SLV is listed at 9.7 oz.
Don't know if it makes any difference to you or not, but both the Integrity & SLV are large arbor reels, while the Sierra is not.
I own several Integrity & Sierra reels, and IMO, for the price they're very good reels. I don't have any experience with the SLV's however.