I don't need a lens with exeptional image quality that's why I chose the 17-55. Just a reliable lens that gets the job done, is of good quality and that fits the budget.
In this range, there is SO MUCH repeating information, that it is not funny. Have you tried a search here?
Last year, 3 independent photo magazines did a shootout between the Nikkor 17-55, Sigma 18-50 and the tamron 17-50. The Sigma won ALL THREE TIMES and it is 1/3rd the price of the Nikkor.
This concept of not wanting to to purchase the best lens out there is just... strange. Who wants to plunk down money on a lens that is sturdy but gives mediocre results? No photographer that I know... and I see the word church. Wedding photography? Nothing BUT the best should be in your head!!
In this range, though, you should be looking at lenses in a huge focal distance range like 30mm F/1.4, 50mm F/1.4, 70-200 F/2.8. Nothing slower than F/2.8 either.
When I do a wedding I use everything from a 15mm fisheye to the 24-70, 85mm F/1.4 and the wedding photographer's bread and butter, the 70-200 F/2.8.
The camera body is also important, as you want something that is good between ISO 800-3200 for the times that the shot just looks better without flash or you are simply not allowed.
Then there is the whole concept of
off camera flash. In today's world, if you haven't
mastered it, you are losing about 80% of the potential quality shots compared to shooting without it, whenever possible, of course. Here is the rub... 90% of the time on camera flash will be refused becuase you are blasting the people 5-20 feet from you. If the flash is used as directional fill flash and it is on a tripod 50 feet away... you are allowed to use it more often than not and it is NOT intrusive... you just have to show that it is not AND prove it, as well as know how.