Hi. I would say for intel:
one of the intel cpus e2160/e2180/e2200 - 43£/48£/53£
and the mb: gigabyte ep35-ds3r - 80£
123-133£
and for amd:
MB:
Gigabyte GA-MA770-DS3 - 53£
or Gigabyte GA-MA78GM-S2H(this is a micro-ATX board with integrated graphics)
- 62£
CPU:
AMD Phenom 8450 Triple-Core - 99£
152£-161£
I've taken the prizes from
www.Komplett.co.uk .
So that would be my choice. Hope I could help.