well I am glad I am not the only one hearing the pebble noises. I just noticed them the other day, then again I just got my Z
I hadnt noticed them before because the radio is always on. As for the interior noise, coming from a 2008 STI, the Z is a caddy by comparison... well maybe thats a bit of an exaggeration but it certainly is not as loud as my STI was on the inside.