I don't know much on the stomp, in fact I've never heard of it. But the Silencer is an all right cheap park ski. And the MSP is just plain retarded to get. No way you should even be thinking about that ski.
4FRNT TNK or STL are more park specific than the MSP (a stiffer all-mountain) Go with the 155 TNK if you want a more center mounted smaller ski or the 167 STL if you want a longer softer ski with a more traditional midsole mount (further from true center).