Whats the difference in having a calibrated set. If i got new pickups for a guitar ide want to get both bridge and neck.
If you get a Miracle Man calibrated set, you'll get a MM bridge & MM neck. Likewise, if you get a Nailbomb set, you get an NB bridge & NB neck - so don't order a MM bridge & MM neck separately because that's what a calibrated set is :)
The thing to understand about BKP neck pickups is that they are voiced specifically for the neck position to compliment the corresponding bridge pickup. They're not just the same pickup & not the same spec (e.g. NB bridge is 16k, NB neck is around 10k)
As I posted earlier in this thread, the Cold Sweat neck pickup is a popular alternative that goes really well with both MM & NB bridge.
Or you could go for a serious contrast in output between bridge/neck (you mentioned using the neck for cleans only) & get something like a Stormy Monday neck. I'm not convinced that's a particularly good idea though...