"Member kotengu took his first deer with an FAL last year."
I plead guilty! I would agree that there are rifles that may be better suited to hunting (a lightweight bolt gun would be ideal), but I used that FAL for two reasons -
1. To become more familiar with my weapon of choice, practice my skills, and put them to a little more reality-based "test" than punching holes in paper.
2. The FAL makes a great "general purpose weapon", where it can be used for everything from troop issue, to shooting 3-gun matches, to general range plinking, and hunting just about anything in North America. Sure, they may be better choices for each individual event, but I have found none that can do all of them any better than the FAL
If you have unlimited financial resources - buy a specialized gun for each thing you want to do in life, and more power to you! Keep in mind you'll also have to allocate a lot of time in really getting to know each firearm, not to mention all the varieties of ammo and the like.
I'd have to agree with the low-power scope issue though. I started out using just iron sights, but after the difficulty in picking up the front post in the near darkness, I switched to a 3-9 power Leupold that I almost always leave on 3x. The added bonus to a scope is it's great for confirming target identification.