hmmm, maybe you don't need to go that far with the wheels, but $80 for a pair is a great price. If you want to take a more conservative approach, I'd do all the hub repacking but just replace the spokes that popped and have the wheels tensioned and trued.
The seat post is an early GPM, also known as Gipiemme.
This seems to be in about the same league as an A-D Inter 10, so it's probably 531 (at least 3 main tubes, maybe thruout)...should be a nice ride!