I am / we are not bothered if stuff matches or not but I WOULD like to find a suitcase that drops into the boot floor and therefore makes best use of the space. The one we use for weekend trips is just a fraction too wide.
All I need to do is measure the boot floor and take tape measure with me next time I'm in town. But I forget.
Actually, everything I've coordinated has been to the Black Jack accents. The dealer gave me Black Jack valve stem caps and I bought a shifter knob insert and this handy towel that fits over the headrest to protect the seat if you're wet or covered in evil, etc.