PC DIY is a hobby like many other things. Want to spend a ton of money? Have fun. Don't want too? That's valid as well.
Rant time about those complaining about too little versus too much GPU power:
What I truly don't understand is people who moan that they can't run games at ultra settings, but refuse to budge on tweaking. It's like it's ultra or nothing. Which is quite frankly, stupid, because you can lower the visual preset by 1-2 notches and the game will not look different. Crysis 3 at very high versus high looks no different. Yet if you take the stupid setting of ultra with 4X MSAA versus "high" with FXAA you gain like 30-40 fps.
I mean I have a pretty sick GPU setup, 780 SLI. But sitting here tweaking on one GPU which I ran for some time, I literally tried to make games look bad. Now if you go on low presets, they could look bad. But at ultra versus high and very high? They look virtually identical with my 20/20 vision. So I'm trying to figure out why people complain about not being able to run ultra settings. Hello? Obvious answer: Tweak and don't run ultra settings. The game will not look different at ultra 4X MSAA versus high or very high. PROMISE. I've tried this numerous times. These games have overkill settings that don't even affect image quality. But for some reason, some people cannot tweak. Can't tweak won't tweak. But instead complain about ultra 8X MSAA framerates.
Or the other side of the argument. I can't use all of my GPU horsepower. Hello? Better monitors. More monitors. Why anyone would get SLI or CF for 1080p blows my mind. I sure wouldn't do it. And yeah, the occasional game may not run at 60 fps ultra settings. See above paragraph for answer to that problem.
Anyway, that's just my thought on anyone complaining about SLI or Crossfire. If you want to use that horsepower, get surround. Or get better high resolution monitors. Or get rid of one of your GPUs and use your common sense if you can't run a game at 120 fps on ultra settings. Use your common sense to lower some settings. I promise the game won't look different if you tweak 1-2 settings, but it will run much better.
In the end. It's all about what brings you pleasure for your hobby. If you want to spend more money on your PC for more GPUs and more monitors, it's fun to do that. I've certainly obliged to that many times over the years. You could easily waste thousands of dollars on truly stupid things as lava mentioned. What I don't understand is complaining about "too much versus too little" with this hobby of ours. Hello? If it's too much or too little GPU horsepower, adjust accordingly. Change your settings. Tweak. Get rid of a GPU. Use common sense. Just look at it as a hobby and do what you can to increase enjoyment, instead of complaining about it. IMO!