Like Chefdave I was wary of non-traditional kilts but once I tried them I loved them.
My first was a Freedom cargo kilt which is quite heavy, but being custom made is a very good fit. I was so pleased with Steve's work that he got the order to make me up a more traditional kilt from my xmarksthescot tartan fabric.
I have a second hand Utilikilts Mocker which I quite like. The reason I did not buy a new one direct from Utilikilts is that I have read a few horror stories on the net about their ordering system and people getting the wrong sizes.
I also have two shades of denim Union Kilts which I do wear quite often, but be aware the front apron overlap on these is relatively narrow so they can be prone to flying open in the wind.
Midas Clothing in England do a range of lightweight kilts but apart from solid colours their only tartan is Buchanan. They also produce a range of kilt like garments which they sell as skirts for men, ranging from trojan and box pleat skirts in denim and camo through to unpleated denim cargo skirts complete with front zipper fly. The ones which I own are quite macho looking garments and when people see me wearing them they always refer to them as kilts rather than skirts but you should be aware that these are MUGs rather than true kilts.
Another garment which is marketed as a kilt but is really an MUG as there are only a few shallow stitched down pleats at the back to give the garment some flair is the BlaKlader Craftsman Kilt. I own one of these in black and it does have lots of useful pockets and its longer length can be an advantage on a cold winter's day but its not one of my personal favourites.
I have seen some very good reviews of R-Kilts and have now ordered one of those.
I also have a USAK semi trad which is a good lightweight kilt as well as presenting a more traditional appearance.
Pictures of most of my kilts have appeared here and they can all be seen on my website.