Also, I have the G.Skill Turbulence II, I don't think it'll be really required as there are more fans in the case then there are hairs on my chest but I just figured it'd be a good safety measure.
Those RAM coolers aren't necessary, unless you like the looks. The RAM will run nice and cool at its rated 1.5V, especially with good airflow which the HAF has. Looking at it more closely, I don't think there's a RAM cooler available that will fit properly unfortunately.
I Think I found the Molex to floppy, Not as long as I would have liked, and why does it have 3 of those 4 pin weird things from before my time? xD
Found a picture
here for you, the adapter is the second from bottom on the left. They are pretty short heh, makes it a pain when you do need to use them, but thankfully floppy connectors are barely used any more - at least they're not on the cable with the Molex connectors for once! Which are the "weird 4 pin connectors" though?
Also, my front 230MM fan has 1 of those large 4 pin inline options, should I use it or just use the connectors which are actually from my generation?
Makes no difference how it's connected, from memory it can use either a Molex or a 3 pin fan connector, which you choose is entirely up to you.
What is a good way to check is the Antec Kuhlmer 620 is working? Don't want to let it go through a full bootup if the cooler isn't working.
Just load up into the BIOS and check the temperatures, if it's constantly rising then the pump isn't working. It'll vibrate (a little or a lot, depending how sensitive you are) but that doesn't necessarily mean it's working. Just a quick tip, if you didn't already know - make sure the 3 pin connector from the pump isn't on the CPU fan header, it won't work properly from there.
(Sorry about so many questions, Just don't want to go and wreck a computer before I even use it)
No need to apologise, better to ask and be sure. I've built a lot of computers in my time so I don't mind answering any questions.