Everyone I've met or spoken to about the Dimarzio deactivators agree they have a very EMG like tone and I'm going to have to agree. If this is what you are looking for, then I would definately go for one of these. However, if it is just a chunky, tight, articulate sound you are after, arguably better and definately more natural and organic than an EMG, I can't reccomend the Bareknuckle Warpig enough. It has a much smoother sounding top end, and tonnes of low mid (but not too much for mahogany) and a really high output, without sounding overly processed and compressed. For an american, this is quite an expensive option as these are hand built English pickups, but if you can wait and save, I'd say it would be worth it.
I'm afraid I can't show you any clips that do it justice, but I'm recording some stuff for my band with a 5150 II next week, so I'll make some comparison clips between that and an EMG 707 (closest I can get to an 81). It wont be a totally accurate comparison as the Warpig is in a Mahogany Les Paul and the EMG is in my Loomis which is ash/maple but it'll give you an idea.