Hi Raybambam!... 5 speakers??? no my friend, the best sound that you can give on your rd700-300 gx , its using a studio monitors or Reference Monitors, believe me, it was so hard for me to get there, but now i'm usin the M-AUDIO Studiophile BX5a Deluxe....and i can't imagine a better sound!.
That's my recomendation for home!, if you nedd a stage sound, better try whit the roland KC-880 or 550
See U!