Yea, i would be concerned about vibration too. Good idea tho!
Any wires going to the main amp from the source should be sheilded. I would try to keep any audio wires seperate from ANY computer wires. Now adays with processors running at such a high speed, its like a transmitter.
This is my next project, installing a good sound system. Let us know what you learn..
Dual Lilliput's 70NP/C/T
Syntax SV266AD KT266A
AMD Athlon XP 2000
Viking 256MB DDR
D-Link Wireless 802.11B
OrbitMicro 250W DC/DC converter
SII Wireless Audio Link
BU-303 USB GPS