After a long wait I've made a bold decision to purchase a professional category lens - Canon EF 70-200mm f/4.0 L IS USM Lens. With no time I fell in love with this amazing lens. I was completely satisfied with its result and was glad to make this decision.
For the first time I realised the quality of L category lens. If my budget permits I shall never buy any lens other than L category.
The color and contrast of images taken from this lens were unbelievable. I could find a distinguished quality in image when compared with my previous lens, making this as the default lens to use for some time.