my IM's have been kinda screwed up so in case you didn't get it -----
125A service --- you need #2 copper wire (x3). two hot legs and a neutral
you can use #6 copper for the ground. Use a 5/8" x 8' copper ground rod.
You will need to put yer 125A MAIN Bkr in a box just below the meter can to protect the wire from there to yer shop.
"Bubba" might go with 1 1/2 pvc but "Bubba" is sometimes cheap and will fight something to save a penny.
2" sch 40 PVC would be lovely and they will prolly require anything above ground to be sch 80.... or steel conduit.
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