This is sort of an opinion question:
Hypothetically, what's the most physical pleasure one can get for $400 in the "hobby"?  (e.g. 2 girls, one girl with specific acronyms, etc?)

Two girls rotating across your face and your johnson, finishing with a twin BBBJTC, with one girl taking the load while the other pumps the fluid into her friend's mouth.  A short round of snowballing follows.

Oh. Sorry.  You said "in the hobby".   Sorry.

Massage and bbbjcim.  And you can use the other $150 on something for the wife...

for me it was the connection.  I've had those spine bending, mind altering, toe-curling Os a few times in the hobby but in the last couple of years it was not dependent on the specific physical activity.  It was dependent on the level of connection I felt with the provider.  I've had the great fortune to see some providers such as Lauren, Daniella and Terry Lynn who make you feel so special, so connected to them and so warm and content in their company that you want to hover there on the edge of your O and ride the peak forever.  And afterwards you wish you could be as special to them as they have been to you.