call me wierd, but for the store shots, i would ask u to consider the 10.5mm or the sigma 15mm fisheyes. I know is unorthodox to use fisheye due to the distortion, i have found that many customers actually find the shots more pleasing if used tastefully. The wideness is hard to manage, but the distortion gives it a nicer feel i can't quite describe. I find that the corrected wide angles do not have the same impact. again, its a lot on how u use it. B&S, i'd go for a 20mm, a fisheye, a 60mm Micro and a 135mm. All relatively cheap primes. U do not need the longer focusing distance that the 105mm affords.