Are you having noise or vibration issues? Frankly, adding limbsavers where they're not needed is pointless, unless you just like having crap stuck all over your bow.
When I was recently shopping for a new bow, I was amazed at how quiet the 2011 Bear bows are (didn't shoot any of the older models). We tested 2 or 3 models of half a dozen brands and never found a brand consistently as quiet as the Bears, and all of the Bears we tested had very little handshock and vibration.
A decent doinker on the stabilizer, some cable leeches, and you'll probably be well set.
From a marketing perspective, Bear might have put the limbsavers on the Mauler to 1) seem like an improved package, or 2) make up for a little extra noise. Since the Mauler is more expensive than the Charge, and pushing a 328 IBO speed, both are likely true in this case. Personally, the Strike was my favorite from the Bear line up this year, coming in the quietest, with a very reasonable price, and a butter smooth draw.
If only those Bears weren't so danged ugly! haha!