CDNI is great, the bottle I got from Amazon has near identical performance and scent to my buddys genuine bottle of Aventus from which I had a 2ml sample of.
Also loving Acqua Di Gio Profumo, especially nice straight after a shower - very fresh.
I went by a friend's recommendation for a cheap and fresh scent for the office..
David Beckham's Instinct. Bought a 75ml bottle for £12 and its seriously better than the price tag suggests. Ignoring the fact that it's a celebrity branded frag, it's a solid choice for wearing daily. It's not going to net you compliments but it lasts through a typical 9-5 and is very refreshing.
Another cheap but strong recommendation is Sultan by Al-Rehab. I picked up a
6ml roller from Amazon and stowed it in my rucksack for holiday to use as a freshen up between stops. Nice and spicy, but not too strong and for £2.80 delivered I had no complaints at all. It's a bit like a soapy SpiceBomb.