Right having a chat yesterday with the audio shop & a couple of phone calls later i think im going to go with a 12" Rockford Fosgate shallow mount sub,gives 400rms i think,powered by the RF p400.4 i think it was as i cant get enough power from a 3 channel to power the sub.
They also pointed out a set of RF comps for the front so it keeps everything the same,they were £250 though so no thanks.lol.Ill get some around the £150 i think.Ideally need to shift on my current sub & amp as ive just taxed the zed so thats me pretty skint now
Oh im changing my h.u aswell,getting rid of my IVA-D310rb today & ive been looking at the Alpine x305 at the minute