If your budget is exactly 8K, then get W810i. Its camera is better than K550i.
Comparing, K530i & K550i, K550i is the way to go because it has LED flash & AutoFocus.

Then later, mod your K550i to W610i using a_k_s_h_a_y's tutorial.
Or if your friend can somehow increase his budget by 1500, then get K790i which has an excellent 3.2mp camera, AutoFocus and much powerful Xenon Flash. K790i will be the ultimate fone in 9.5K.