In my full rig I use a Carvin 4x12 with stock speakers, a Jackson 4x12 with two Vintage 30's and two Eminence of an unknown model, and a 2x15 cabinet I built that has 300 watt Ross PA speakers in it. The only speakers that have a treble bias are the Vintage 30's, but that cab is the bassiest I own, so go figure.
No, it's not contradictory to claim a lack of low end and a prevalence of 40Hz farty noises. The best way I've heard it explained was Jason Broadrick from the band Godflesh said that he liked his tone to be just a lot of super-low end with a really fizzy top and nothing in the middle. If you take that and shift the 'nothing in the middle' down a couple hundred Hz, you get the tone you have. There's nothing in the low midrange. There's no body to the tone, it's all midrange and non-musical lows. This isn't bad, mind you, just not what I'm talking about when I refer to low end. I think that's where most of the problem is, we're just thinking of different things. You're talking about Metallica type thrash low end where you have that really tight WHOOMPH sound on palm mute (gotta love it), while I'm talking about SunnO))) style bowel-quivering low end.
EMG's have a practically flat response. They're designed that way. With the possible exception of the 85, they don't have that midrange bump that most passives have. Yes, the pickups themselves have a lack of low end. This doesn't mean your AMP has a lack of low end and can't compensate for it. I understand you're using a Mode 4, right? Those things are like low end monsters. A freaking single coil could rattle the walls. A WEAK single coil. That's out of phase. Or something, I dunno. Whatever the case, EMG's aren't bassy pickups and the dude asked about bassy pickups.
On to other crap, I've heard that these pickups are really good. I don't personally know, but a couple of guys I trust on matters like this have recommended them. They're expensive as hell, so I probably won't be picking any up soon.
http://www.bareknucklepickups.co.uk/ZH-warpig.html