I dont really plan to do any power upgrades since it is a work truck, so I don't think I should have a problem with egts in the first place, but I will tow heavy occasionally.
What brand of gauges are popular and reliable?
Congrats on the new truck! Welcome to the club! These trucks are real workhorses.
I have used AutoMeter gauges with good luck.
Even with a work truck, a good tuner can help. I have DP Tuners on 2 of my trucks, one of which is a 6sp. I've been running one on my F350 dually for 5 years, have an 80 hp economy tune I use 95% of the time, which picked up 1-2 MPG and alot of driveable power. The Deceleration tune is great for towing and even empty, kick it in, and the EBPV kicks in like a jake brake to help maximize the motors help slowing you down. Yes, you can switch tunes on-the-fly, while driving even. It's nearly instant.
Both trucks have these tunes: Stock, 1200 rpm hi idle, 40 0r 60 hp tow tune, deceleration tune, 80hp econo, and the red F250 has a 120 race tune.
Once you run a good tuned truck, you'll never go back...
You said you already have a big air filter...
Straight pipe the stock exhaust...
Gauges: Boost and EGT for sure...
Good tunes, not canned stuff like banks, edge, etc. Go for a DP Tuner, or others like the TS 6 position chips with tunes on them from people like Tony Wildmand, Bill at PHP, swamps, etc.
'99 E350 DRW Stahl 11' util box van, 7.3 PSD, stock. 138k SOLD
'00 F350 extcab, 9' utility bed, dually 221k
E'99 F250 extcab, S/Bed 211k
'00 Excursion Limited, 7.3PSD 281k
'84 Chevy K-30, 6.2L TD, woods/trail beater. 141k