I've been using Technic 1200's for 20 years. So, I am biased toward the 12's.
However, I do know, for a fact, that the 1200's are the "industry" standard, world-wide.
I would suggest that you pick up a used pair of 1200's. Then get them tuned-up.
You could get a used pair for about $250 - $300 USD.
peace...