which headset?

[mynydd]

having had a week of frustration with headset bearings etc etc. i think its time to just buy a new headset.
can anyone advise which one though? its for a tricross (2011 i think). there seem to be loads, and im a bit confused, and not sure which to get. also cheapest place to get one.
thanks

 

[Levo-Lon]

There ya go..1 1/8 " integrated
http://www.evanscycles.com/products/specialized/tricross-2011-road-bike-ec025019

 

[mynydd]

Very helpful, thanks v much

 

[mynydd]

Something like this?
http://www.chainreactioncycles.com/fsa-orbit-is-integrated/rp-prod132644
Sorry for all the daft questions.
Thanks