Banning already pulled a 10.9 on like 19 psi with the GT67 ( P trim) in the .63 housing.
There is plenty more left in that turbo, and since you not looking for much more, I would not go for the GTQ. Which needs a .82 or bigger housing.
The new 67 Garret wheel has similar flow numbers to the old T70.
High Z 65's are going for $400 flow matched from PTE and can easily run high 10's like you are looking for.