Your radix is not high--it is slightly forward. Radix position is relative to lower nose size---it influences proportion--and your proportion is perfect. Deepening the radix is possible but difficult.
However, be EXTREMELY careful about having surgery. The straight nose is a very hard problem to correct because there is so little margin for error. I have presented papers on this topic, warning surgeons, at recent plastic surgery meetings. Your tip is beautiful. You have a substantial chance of being worse afterward, as manifested by the fact that the average secondary patient I see who originally had a straight nose has already had 4 rhinoplasties to correct it.
I would rejoice in the fact that your nose is nearly perfect, and spend your money elsewhere!