bags or shockwaves

[grady5]

i have been looking around this site and have seen some people who built their own frame are using shockwaves up front instead of bags. i was wondering why. what is the advantage of the shockwaves. they cost alot more but what makes them a better choice? can u use regular bags with tube control arms?also can the bags handle a high horsepower motor like around 500hp?i dont know if this makes any difference but will it be unstable.