should I go for this or 35mm one? i have 18-55mm thought of upgrading but people are asking to get the 35mm instead of 18-200
It depends on what you have in mind to shoot. In my experience, the 35mm is a great indoor/low light lens for photographing my kids while I'm using the 55-200 primarily for wildlife. There's a myriad of opinions on both lens if you goggle for reviews, and they'll likely help you make a decision.