I'm a newbie. I just got my Canon 50D about a month ago. Currently, I am using the 18-55mm F/3.5-5.6 IS lens. I want a better general purpose zoom lens as my only lens that will keep me happy until I improve further. I'm looking for a lens with F/2.8 or better. My budget is aout $1K although I don't mind paying for the 24-70 mm if it's really worth it but I probably need to save for some time first.
I like taking landscape/architecture and portrait photos. The price of the Canon 24-70 is quite steep plus I am still a newbie so I don't know how much good the Canon lens can do for me. Then there is the Tamron 28-75 which is similar to the Canon 24-70 and Cathay Photo quoted me $600. That's like 1/3 the price of the Canon lens. Honestly, it's quite tempting to buy the Tamron.
How much difference is there between the two apart from weight and feel? Which is easier to use? Any compatibility problems (Tamron and Canon?) Most importantly, what about the image quality?
Appreciate any advice I can get. Thanks.