Calculate your UC GPA.
Yes Cal Poly is an excellent engineering and business school, as hard to get into as the UCs (or, depending on specialties, even harder than some). CPP is strong and easier to get into - take the “graduate in 4 year” pledge though because otherwise you may not graduate in 4 years (90% don’t).
SDSU, CSU Long Beach, are also considered strong. Cal State Chico and Sonoma both have a more residential feel and have good honors programs. SJSU has an excellent CS program (that’s very hard to get into) and to scrunch the gen eds by 1/4th you can be part of the Honors Program (it’s a gen ed/humanities program that’s very successful.)