guys im wondering if it would be better to run my setup with 2x2channel amps or 1x4 channel... i currently have a rockford fosgate power 4 channel..very underated 4x50wRMS running the splits in my sig and i will also have a pair oz audio mids 100wRMS, anyway im wondering would there be an audible difference if i ran 2x 2x50wRMS amps, 1 for each set of splits or just leave the RF how it is?

Rear fill off the head unit and bridged for the splits. More power to the front will have the biggest audible effect.

Which if you follow this advice leaves you wide open to clipping the little amp in the cd player and with no crossovers on the rear speakers will lead to sudden death. No offence intended boomer but it is always best to protect the speakers from issues like this. The gain for the rear speakers can always be turned as low as possible and this will still provide the front stage / rear fill and give all speakers a good solid crossover (24db in a power series amp). I would leave things as is right now. There is not much use going to two 2 channel amplifiers other than time for a change and running extra wiring and the possibility of opening up a difference in ground potentials and the noise that normally comes with it.

my clarion hu has no internal amp either

Yeah, all fair enough. I guess I was thinking in terms of head-units with both internal amps and electronic crossovers. However, I also think you can easily avoid clipping if your rear fill is faded adequately, and you play your system at sensible (non-distorting) levels. I don't even have any rear fill at the moment. In my opinion there's alot to like about the pure 2.1 stereo system. In your case though static existence, I agree with forbidden to leave it as is, not that you really have many other options beside new purchasing a new head-unit and/or amplifier.