Do you want to use the same driver sizes? If not you can use the PC251 with 5 1/4" drivers for the center and two P153 bookshelfs for surrounds.
You can use a primus bookshelf for the center as well but the tweeter will end up being far left or right if placed horizontally. Not sure how that would sound since I haven't tried it. Nice speakers.
PSB Image T5, PSB Image B5, PSB Image B4, PSB Image C4