op, are you planning on amping those? first set of speakers i installed in the gp, i was not really impressed with the performance until i amped them. Makes a world of difference.
I have a 4 channel amp (400 watts) that I installed earlier this year. Made a huge difference. So whatever I get will be hooked to it.
Bonneville's have 6.5 inch speakers stock.
Also, I have bought numerous things off of Sonic and they were all definitely brand new.
-Carl "Penelope" - 145k Miles 2003 Bonneville SLE