I don't think that neons, and hood washer leds will draw enough current to cause damage with even with a large amp
Now for amps since this is a sub set up I have one recomendation
JBL 600.1
- wire in parallel, that will put it down to 2 ohm, 300 per sub. remeber gain happy people kill subs.
- or you can wire in seires, for an 8 ohm load. and probley send around 150 to each sub
Ebay auction JBL bp 600.1 
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