Depending on what your wheel backspacing is id say keep the 3'' spacers and spend the money on marlins 25mm kit or the trail-gear eliminator kit. The tire swap alone will take a ton of stress off your drive train and the extra width is nice. I like my rigs to have a little wider front wms personally, mostly because it seems easier to have your rear tire follow the same line as your front tire when your approaching an obstacle at an angle( most the time ). But like everyone else said it wont be the end of the world to run 1.5'' all the way around.
