thanks to Verbalkint, finally got the pix uploaded.
(I thought I need image linked from another site)
pix of aFe CAI on X5 3.0, Icelink adapter for ipod, Infinity Amp for subwoofer, and JL 10W3 with proWedge box.
I think the sound is good with the stock speakers plus a subwoofer.
IMO, adding the subwoofer was the best mod I have done so far. (with ipod)
Icelink works pretty well, and ipod can fit in the ashtray.
CalvinX5