Obviously, tools are expensive. I believe you get what you pay for. I still use Craftsman tools alot, one because I haven't had any issues with them, and two I'm not ready to spend $200 on a 3/8 ratchet. That's just an example, but you get the idea. Both companies have good products. I personally think Mac has some "cheapy" things they sell, but I guess everyone does. I would say if I were in your position, if you're getting a bunch of tools, for a good deal, with a warranty, I would go Snap-On. I don't personally have much but I've used alot of Snap-On tools and I've always liked them.
In my position where I never had an opportunity to buy a large amount of tools for a discount price, I have to buy everything individually. I'm also good friends with the local Mac guy, so I usually buy most of my stuff off him. He usually takes care of me, and I can count on him if something would happen (if something breaks, etc). The Snap-On guy on the other hand is super unorganized, and a d**k head so I choose not to buy off him, unless its something I really need.
Hope some of this helps. I've only been a technician for about a year and a half. I'm sure theres others on here with more experience and advice.