Hmmm...
Exactly what 600hp BMW are you referring too... the BMW Williams F1? It runs a 10 cylinder of about 3liters, and I betcha at low speeds it clunks as it probably has no flywheel, just a little muliplate clutch. The badest production Bimmer is that 760iL with a whopping 438hp and no manual trans...
As for MB (the other house of DaimlerChrysler) yeah, the SLR is huge at 617hp. But again, no manual, and it has electronic throttle control to handle such a beast (as many drivers feet cannot). As for AMG, they don't have a single car with over 500hp, and the ones that come close are not naturally aspirated, and thus have way less power at low speeds and low throttle inputs.
Has anyone driven the CLK-GTR (650hp V-12 Naturally Aspirated and only 2200lbs)? Well it's lightweight flywheel induces the same effect you are feeling in your SRT10. The Porsche Carrera GT has an exceptionally light flywheel too... just read the recent articles. Further, drive an SRT10 with a lightened flywheel, the "Bull-Hunch" effect increases dramatically, but the explosive nature of the acceleration is well worth training your foot to apply smooth fuel at low speeds.
Or simply use say 4th gear at about 1000rpm for pooching around town. (Or use that snake oil hammer with reckless abandon)
If you want to eliminate this effect get a heavier flywheel (or an automatic with it's fluid coupling). You could even try a less aggressive throttle plate cam so you'd have to push the pedal more to increase power, and make it less susceptible to the hunching.