Mattia, EMG's description of the 85's "beefy bottom end and fat top end" probably doesn't equate to a "nice and crisp" clean sound, but again that's subjective depending upon taste. I personally like more treble and high-mids in my clean sound.
Hughes, you don't describe the guitar you're putting them in, but most people use the 81 in the bridge and an 85 or 89 in the neck. Some people do 81's in both. The only real difference in the 85 and the 89 is that the 89 is a dual-mode pickup that will sound like an SA single coil in that mode, and very similar to an 85 in dual mode. I personally prefer the S single coil sound, which is what I have in my Strat, but the SA isn't bad. It has more midrange than the S. If you just want a single coil sound that is more crisp, the EMG H (not to be confused with the H4 and HZ passive pickups) is an EMG S single coil in a humbucker body, and would work well in the neck.
So, in summary, I'd go with an 81 in the bridge and either an 89 in the neck with a push/pull pot (included) for the switching modes, or an 81 in the bridge with an H in the neck. Either should get you what you want. Or, if you change your pickup routing and go H/S/S, you can do an 81 in the bridge with an S and SA in the mid and neck positions for some awesome tonal flexibility. I would honestly stick with a full EMG setup unless you want to deal with headaches involved in trying to put both in.
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