Piaa SMR or ATP?

So maybe somebody with these lights could enlighten me. I'm going to be putting lights on my shrockworks style plate bumper.
My question is in the 4" cut outs in the bumper should I go with 510 smr or atp? this would be in combination with some 520 atp on top in the middle.

Something like this



Thanks for any thoughts.

 

How about some Hella 90mm headlight modules instead? Way cheaper, and probably better output. Rallylights.com sells the H9 high beam patterns for I think about $50/ea. The newer H1 housings are a bit better, but may be a lot harder to find in the US.

They also make low beams, bi-halogen, and an array of Xenon.

90mm is about 3.5".

It may not be the solution if you are looking specifically for a fog pattern.