This will be my first PC build from scratch. Previous experience is limited to troubleshooting my old PC (which saw the death of quite a few components over the years...)
The PC will be used for a bit of gaming such as GW2 when it launches (hopefully in 1920x1080 resolution), a bit of programming (R, Perl, Unix and Python most likely) and various software used in biology (PyMol for instance).
Unfortunately I am from Denmark and so, everything is 10-20% more expensive for me or may be unavailable.
I am a little unsure which MB is best. As far as I can see, both has received good reviews and not sure what benefits I get from the Z68 model compared to the newer Z77. Both costs about the same for me, so cannot use price to decide between them.
I will be reusing my current video card (Gainward GeForce GTX 275) and my PSU (Corsair VX Series 550W PSU, but cannot find a link, sorry) for a bit of time - hopefully. I intend to upgrade both later on, I just need to decide if I can afford SLI or not, and wait for the new GeForce video cards to arrive in EU.
I consider an upgrade of the video cards to GeForce GTX 670. Not sure which upgrade to go for when it come to PSU. How much power should it have for a single video card vs. SLI? 550W vs. 750W? I will probably try a bit of overclocking on the CPU when I have read up on the subject, so my PSU should have enough power for that as well.