I don't know what the final look you're going for is, but I like the mud tire look. With the spare, they give it a look of purpose. Like it was made for Pikes Peak or similar.
A little more tilt may look better on the spare. From that side pic, it looks like you need about 3" more behind the axle for balance. A bumper will fix that.
Gauges - I instantly thought hour meter. Something from old industrial equipment - the only problem with that would be finding something like that that actually had a speedo. I like the tach in my F100 because it say 'overspeed' at 3800RPM's.
(just my unsolicited opinions, of course!)