TL;DR: Has anyone has swapped their primes for the Olympus 12-40? Regrets/Success? I've never been much a lens swapper and prefer to travel with minimal gear. If I'm going somewhere local, I'm only bringing one lens. If I'm going on a trip, I'll bring everything and chose one lens for the day based on expected conditions. I recently switched to m43's from APS-C and am loving it. My current setup is as such: -OM-D EM-5 -Oly 45/1.8 -Oly 25/1.8 (on preorder) -YN-560 III I've read all the reviews of the 12-40, and it sounds great. A bit pricey, but am honestly wondering if I'll notice a difference in IQ if I were to get rid of my primes and just use the 12-40? Financially, If I were to return the 25, and sell the 45, I'd be looking at around a $300 difference. That's roughly $50 more than the cost of the Pany 14/2.5 that I'd need to get the same range. I'd be sacrificing a couple stops, and some bulk, but gaining the versatility of a single lens. Surely others have gone down this path. Would love to hear if the primes are missed, or if the versatility makes up for it.