Your help is always appreciated! I wish this forum had rep so I could give you some

The Radeon HD 7750 is the fastest graphics card that doesn't need an auxiliary power input. You can just plug it in to a PCIe-16x slot.
The 650 Ti needs a 6-pin PCIe slot for power. I'm talking about adding in a graphics card into the old computer while I wait half a year for prices to go down on the higher-end components. I didn't even realize PSU had PCIe power slots... so the current Allied PSU that I have might not work with the 650 Ti, but I know the motherboard does not have any 6-pin PCIe slots.
I wonder if I could OC the Athlon II X4 635 at all? That might be useful if I decide to wait half a year and try to boost some performance in the meantime.
If I don't add a graphics card to the old computer while I wait, I can still use my laptop, which is decent for low-end games like Torchlight, indie games like Bastion, etc. I have high-end games like Alan Wake but I don't NEED to play them right now, especially if it's more cost-effective to wait.
So the differences between RAM are actually really minor... hm I'll have to think more. Honestly, I agree that I will eventually get 8 GB of RAM, but I just want to wait to get it because at this moment RAM prices are high whereas a couple months ago everything cost $20-30 less.
I'm not married to SeaSonic brand. I only picked that one because someone else on the forum recommended it. I like Corsair's cases and memory: I see no reason that their PSU would not last a long time and isn't high-quality. Unless you know otherwise, of course. But a savings of $25 is a good thing because I can sink it into the GPU.
EDIT: So the Corsair is clearly inferior to the SeaSonic, from what I've read. SeaSonic has reputation of very high quality = lasting a long time, whereas Corsair ones can fail after a while. Right now, Corsair is on sale for $38 while SeaSonic is $68. It's hard to justify paying double... but I'm thinking it is worth it.
Wow... if I can't even play Okami, fullspeed with LLE in HD, then it's not worth it. That's why I got interested in Dolphin in the first place!
I can't really afford to be constantly updating the system... that's why I wanted to wait until the architecture changed significantly again.
Like RAM, it seems like SSD prices are high right now and I'm waiting for them to go down. I've used computers with SSDs before and while I love the responsiveness, like RAM, it's not essential to gaming performance. Load times are slightly shorter. As long as I can play games with my SATA II HDDs, everything is good enough until prices go down.
Yeah, liquid cooling is really not necessary and I'm thinking in 4-7 years it will be more mainstream and efficient.
I'm thinking that when the 760 comes out that might make the 660 Ti go down a little in price, putting it in budget.
EDIT: GTX 760 is out, and it's a beast. $250 and it's better than the 600 Ti (putting it better than the 7870 XT as well). The ones I would want (with the factory overclock and the improved cooler) is the MSI Gamer edition with the Twin Frozr cooling or the Gigabyte Windforce edition (which has slightly higher factory overclock). Both are $260. I'm thinking they are worth it... if any card is going to last me 5 years, it'll be that one. Thoughts?
When it comes to graphics cards, I would like to at least try to hit the "recommended requirements", but I am also OK with turning down quality to high or even medium if I can't play on Ultra. I've never actually HAD a high-end PC before, though, so take this with a grain of salt. I've always played all games on low or lowest so far, because I've never even had a computer capable of more than that. When you play games in low all the time, they don't really look how they "should" look. For example, The Secret World is designed to be very atmospheric and moody, but at lowest quality settings it doesn't get that feeling at all.
What are your thoughts on accidental damage extended warranties? Are they ever worth it? I've read some horror stories about motherboards being fried...