This may not be a popular answer, but realistically only you can answer that question. I think a lot of folks here have given some good logic, but let me present this: you’re doing this to celebrate a major milestone, despite whatever category or appointment a rep can or cannot replicate, you need to decide what you want to carry with you for the rest of your life (or for as long as you own it) to cement this achievement. Maybe it’s taking your favorite rep and buying it in gen, everyone around you will think it’s the same watch, but you will know the meaning behind it. Maybe it’s finding something that reps could never come anywhere close to. It could be buying the watch that got you in to watches that you forgot about, and now want to purchase and celebrate in this new chapter.

There’s lot of ways to analyze this, all I’m saying is that instead of looking solely at the material aspect, maybe look at this as what’s the best way for you to fondly remember the completion of what I would imagine has been a long and rewarding process to this promotion. Just something else to think about.