those are real beauties . Using the buff as the centerpiece will be a "showstopper" . Do you have another pic of the kudu in position on transom? I am in the early stages of planning a trophy room and do like your approach. Also what is your opinion on european style skull mounts ? For big buff or kudu bulls nothing compares to the chest or shoulder mount . Same for sable. That said I also like the spare, stripped down, esthetic of the skull mount. Oryx done this way can be impressive.
As an aside , If you have a shot on an good impala ram it's definitely worth considering. The thick horned, muscular, older rams present surprisingly well . Any thoughts or suggestions on mistakes to avoid or trophy room design would be most welcome.
Good luck with your project and the future hunts