I love my IT's and MM's in my HSS-strats, but I think Nolly's advice is a good one. The Slowhands will provide more mids then the IT's and therefore be more on par with the SD, still retaining that vintagehot sc-character. However my neck-IT doesn't sound whimpy at all, certainly not with my amp (Orange Rockerverb 50 head/2x12 cab).