I will try other twins of very expensive perfumes such as Aventus Creed and pay attention to the feedback. I think it also sets you apart from the run-of-the-mill perfumes that everyone wears.
I hate to say it but aventus has in my experience, lived up to the hype. I'm not a huge perfume expert, but I've bought it a couple of times in smaller sizes from one of the fragrance resellers (of course get a well rated/legitimate reseller if you go for it).
A sample bottle of 20ml lasted a long time, I reckon around 50 wears but dont quote me on that. I read that folk say that there's significant variation batch to batch, but to my uneducated nose, I couldn't tell the diff. Very long lasting, like I'd smell it on me slightly the next day after only using a couple of sprays.
The reception for aventus was exceptional - I haven't worn a lot of other high end fragrances, but I've tried a couple (inc green irish tweed) and aventus was by far the best for me. Couple of experiences that are fairly representive, all in clubs:
1) A girl walking past and opening me with "I love your smell". Only fragrance I've had that with.
2) Chatting with some girl in smoking area, we're talking, she catches the scent, smells me, then turns to her friends and tells them to come smell me as well. They all loved it.
Of course it's not a miracle thing, like for noobs reading this you still gotta be well dressed etc, and it's not like every night girls will open you on it, but the effect was interesting.
Also things to consider - certain fragrances suit certain people better.