Here, the price of a 200 A service works out to less than a 125A!.
Nobody stocks a 125, 150, or 175. The demand isn't there. Bargain Basement on a 200

The only difference is going to be in the price of the mast, SE conductors, and GEC if overhead. UG customers needn't worry, except for the GEC
The suppliers have overrun the market with 200A services. Buy it!

The ultimate for the richey rich folks down here is the Square D 600A, with the breaker section in the bottom. I think that the utility here won't allow more without special engineering, or those 60 Amp max load turkeys would certainly buy a 1000A service to "keep up". [Linked Image]