For your weight, I'do go 152 in length. The 152 HD is a bit on the narrow side for a 10.5, so I'd go HDX in this case. If you want to buy more long term, the 154 HD could do it.
For reference, I ride a 160 CTX (2012) at 26.5 cm waist width with a size 12 boot and I could easily have gone with a CT at 25.5 cm waist width. Then again, it could depend on your specific boots.