I have the funds available (with the sale prices) to spend this weekend on either the Olympus 17mm f/1.8 or the Olympus 45mm f/1.8 but I can't decide which one to add to my cart. The problem is that I already have two lenses in these focal ranges so i'm not really adding anything new, just improving on what I already have with something of better quality. The lenses I have are the Olympus 17mm f/2.8 and an adapted Minolta 50mm f/1.7. I shoot primarily street photography or portraits so I utilize both focal ranges equally. If anyone could offer some advice on which to buy it would help me greatly!