Personally, I believe the best bang for the buck on the 1.5T is the PRL Stage 1 intake system. Cost effective and an easy install. You may want to wait and see if PRL produces an HVI for that platform before pulling the trigger. Air Intake gains are honestly negligible from my experience and the only brand that has seemed to actually make some great intakes for the Accord has been PRL.
I run a Mishimoto CAI on my Accord mostly for the carbon lid that looks nice in the engine bay, the gains seems pretty small until I did some more modifications to it.