Originally posted by pmastello Cons - I already own a good lenses at 15mm and 50mm, is it too much to have primes in this range?
Not at all... it's the most useful range that exists. You would be remiss to not own a lens in the 24-40mm range.
I have not tried the 35mm because, like you, I am not into shooting macro. The other suggestions are solid, though.
In fact, you might want to consider this..!
Sell the 50mm for about 300.
Buy the DA 40 used for about 300, or the DA L 35mm 2.4 for even less.
Use your lens money for something in the 70's (the DA 70 would be a nice addition), but you could go for something a little shorter (down to 55) or longer (up to 85). I personally think 70 is the sweet spot for a short tele on ASP-C. You could also go for the 77 if it's a palatable price for you... but I can personally recommend the 70.
Then you would have a wide, normal, and tele. Powerful trio. If you had the DA 15, 40, 70, you would also be someone to envy.
DO NOT follow my advice if you shoot the 50 below f2.8 very often. I hardly did, so I sold it off in favor of using a cheaper manual focus lens for those few times I need f2.
As for the DA 70 overlapping with your sigma... well, try it out. It's a very different lens for the sigma, and would be much preferable for any portrait or candid work of people. It's a beautiful lens.