Great,I love a good home build.
The eBuyer one is ample for you.
Mainboards can start from around £30-00 in to hundreds,depending waht your building.
The board can support upto 8 cores,32 gig RAM.Even looking at the basics such as how many USB port is good.Sound card,it looks like a 7.1 8 channel.
To be honest Ive been off the forums for a good while and not looked at hardware in ages.Maybe one of the boys could point you in the right direction but you have already made a darn good choice and at £107-04 its a steal.
Would you like me to ask some of the guys to pop on and advise you further?
JB.