Those videos are great. They pretty much nail everything you need to know about building a solid rig. And getting help is always useful.
I think cable management put me off the most.
With a good case, there's nothing to it really. Route all your cables behind the motherboard tray, and tidy it up with cable ties at the back when you get a good looking setup. One major issue is non-modular PSUs in that department. Hiding those unwanted cables can be a bit tricky.
One more question is it easy to install a H60 and is it worth it over a CPU fan?
I have a H50, and the H60 looks easier, probably easier than strapping a big hunk of metal to a motherboard. I don't think there are any danger in getting a water cooler, unless you go full retard and yank it around. Then again, air coolers are great as well, and some very quiet, some quieter than those water cooling pumps anyway.
Edit* oh and overclocking? I see you can get the p67 with memory and CPU cooler at the 4.5 overclock, is this a good package?
I suppose. Then again, doing it yourself will be cheaper and not very difficult to get to a decent overclock (30% extra clock speed) with SB. There are plenty of tutorials and discussions about this, and I would prefer to do it myself so I get more control over what voltages to put through the CPU. My guess is, that bundle will put at least 1.35V through the CPU, but some chips can go much lower for that speed.
Secondly, you can get a stock 2500K, then get a CPU cooler later (H60 or whatever), and overclock in your own time. I think it's the best way, you save around £30-£50 on the build to get a better GPU and whatnot, and nothing really stress a 2500K stock anyway.
Thank you for the build examples too they are great!
Cheers

Ross
Thanks. Get a fixed budget, don't skimp on components (PSU especially), and take your time deciding what you want

Stu will probably spec you a kick ass machine.