Go with one of the axlebacks if you like the specific sound they make and just want to change the tips. If you don't exactly love the sound you can always try to have a custom made one. The design of the axleback should depend on how loud you want it to be and what sound you want.
More bends, resonated = quieter, more civil, clean/muffled tone
Less bends in piping, non resonated = louder, more aggressive, raw/raspy tone
I agree with your choice with the tips though! Pictures when done
