Howdy,
All I can tell you is that I wanted exactly what you're asking for.. A P28 with a more closed face. I just compared the P28 clone I was using (TC4) to the P30 I switched to, it seems exactly like a P28, except the toe is closed instead of open. Blade length and lie are essentially identical. The P30 is a touch more rockered / has a little less heel and the toe isn't _quite_ as rockered / pointy as the P28, but they're extremely minor differences to me. The only noticeable thing for me on the ice is that the toe is more closed.
I've never had a P46,so I can't help there. I had a W71 a while back and and don't really remember it being like a P28/P30... I just remember it having a pretty deep / wicked curve. I no longer have it though, so I can't directly compare.
Mark