The two most guy friendly urban fantasies I can think of are also paranormal investigation series: The Dresden Files by Jim Butcher and The Nightside by Simon R Green.
It took me a couple of books to get into the Dresden Files but by book 4 I was grabbing them from the library as fast I could and am now impatiently waiting for the next release. I think the writing has improved and is now some of the best stuff out there - the plotting, the characterization, the high stakes - and riding a zombie dinosaur(in book 7, Dead Beat)!
I've been a fan of Simon R Green for a long time, the Nightside is a very enjoyable series. Sometimes I think his writing can get a bit sloppy, but the Nightside books are filled with energy and ideas (so many ideas - probably twice as many per book than most other writers) and interesting characters. He writes with humour and creates impossible situations for his main character to get out of.
The other writer I really like is Patricia Briggs. Her earlier work is fantasy, she started writing Urban Fantasy with the Mercy Thompson series, beginning with Moon Called. Mercy is a coyote shape-shifter and a mechanic, her neighbour is a werewolf, the previous owner of her garage is fae, and she fixes the car of a vampire. I'm not sure if this series will appeal to you, but it is the best Urban Fantasy series I can think of.
I'll be interested to know if you try any of these books, and if so, what you think. I don't read a lot of science fiction but I've recently gotten into Charles Stross and John Scalzi - it's nice to know there are good books on the other side!