Did the exhaust parts come labelled as to where they go?
I remember my Invidia had all the sections labelled "Driver Side" and "Passenger Side", which had to be swapped around as their cars are left had drive and ours are right hand drive.
Just wondering if it was the same case with MotorDyne.
Check for the "clicky axle", a district metallic sound when initially reversing or slowly setting off.
If exhaust is OEM, check the flange where mid pipe meets backbox to see if it's corroded through or about to.
When you say "Anyway I had a pair of speakers kicking around that a customer didn't want", does that mean you have a car audio shop?
If so are there any discounts for members?
I pulled new speaker wire from my aftermarket HU to the speakers and put spade connectors on the wire.
I also believe that the OEM speakers are 0.5 Ohm whereas your replacements are 4 Ohm, so I'm not sure whether the Bose amp will play well with those.