Hi all...i'm new and have a Q...

[blockrockin]

i think you would get the best results if you replaced and the factory speakers with better quality after market speakers and add a subwoofer , and two amps like you where planning . you could also replace the factory head unit with somethng else and still keep steering wheel controls. i have a pioneer z2 with a pac steering wheel interface and it works great, just like oem ! good luck.