My sponsorship just went through. The only stipulation they have is that they only work with high quality companies so I need some info...

What/Where are the best of the following:

Gauges
Speedometer/RPM Gauge etc
gauge pods
Seats
Back Seats
gps/nav/dvd system
interior lighting
(maybe a HUD)

Speakers (all around with specs)
subs (i'm gonna do two 10 inch or two 12 inch with a max output above 1000 and a RMS at least 600)
amps
cd/players

Shift boot/shift knobs
short shifter
pedals


And when I ask for best, I'm asking: What, in your opinion, is the highest quality/most aesthetically appealing, top notch, hands down, best overall part?

mainstream ish. cant pick the top because it is a very opinionated area so i will just name some.

speakers:
DLS,Focal, Rainbow, etc.
subs:
JL,DD,RE,ID etc.
amps:
Genesis,DLS,butler,
cd/players:
alpine,pioneer,Clarion

Or you can always just go for a single brand system(DLS or Alpine system) with the headunit as exception which might uncomplicate matters for your sponsorship.