Well said kytz, well said.
Kytz has pretty much told u everything up there. But I just wanted to add something. The 24-105 on a crop body may not giv u the wide angle shot. And if ur really scared about noise, better of u stick with primes. U'll get a decent shutter speed n low ISO also. For crop bodies, staying under 400 ISO is advisable for optimum noise control. Even for an FF, it's better to stay under 400 ISO. But I used a crop body before n I love to bump my ISO to 1600 sometimes. Like kytz said above, u can always shoot in raw n pp later. That's much better.