there was a thread on here where most of the different filters were cut in half to see what they're like, The oem honda and the hamp seemed to have the best filtering setup and the hamp raises the oil pressure a bit which is helpful.
You can fit the new HAMP oil filters from K series engines to the B series, and they tend to be smaller which do indeed increase oil pressure. I have one waiting to fit when I install the oil cooler.