I didn't care for the way the enigma looks, so I got the Billet aluminum one from ptuning.com. I couldn't be happier, and the reception with it seems fine to me, although I only listen to Austin radio stations, and I'm in NW Austin.
Yeah, enigma ships out fast - I paid for the TT-style 3-1/4" on a Thursday, got it on the Monday! Love the look - the old antenna reminded me of a pussywillow branch stuck in the roof...
Although I didn't get it from Enigma, mine is the same as the 3.25" low-gloss one in the link Sethlan posted (there's a few people from the Vancouver BC area selling them).
Reception does take a hit - but I live in the city and feel that look outweighs the reception hit.
Solid Billet unit from Ptuning. Very please with it, very quick delivery even to Hawaii. And the reception is fine. I live out a bit and only one station was affected... it's on the other side of the island though and only one click away from another one that is closer.
