stretching my 155 to 163/165 and track selection

I've been looking at buying iceage rails for my 2016 axys 155 for a while and got thinking about buying 163 bomber rails and the xbrace instead. My question is what should i do for a track, the polaris 2.6, or the conquer 280. And if I were to go with the 280, would the 165 3.5 fit on the bomber rails. I would have to buy drivers regardless if i go with the conquer track so 3.0 or 3.5 doesn't matter outside of which track is better. Has anyone else done this?

sw MN