I'll speak for myself here but I would venture to guess myself along with all the other quality guys out there that have fabbed up aftermarket bumpers for this Polaris design blunder experienced the same strength issues when it came to design. I myself had the Slp air intake and tried to design around it and keep the triangle of strength principal but to no avail. There is just no angles possible to keep any kind of impact strength intact when the front of that sled is taken up by those particular air boxes.
I myself found that I had the best luck with the Timbersled intake, however my partner who actually builds the treedog bumper has had great luck with the fni intake. I honestly think the 9's breath great with the slp intake, the only drawback being if a stick or something goes thru the front screen and let's debris get sucked up into the motor.
Absolutely a tuff decision to make for sure. Its just to bad Polaris has forced us to make it. If I can answer any ?'s please do not hesitate to contact me. As for which bumper?? I think all the options out there for these sleds are fantastic.
Good Luck
T