To be honest, carling (league cup) seems more prestigious when looking some games:
5th round:
Blackburn Rovers 2-3 Arsenal (aet)
Chelsea 2-0 Liverpool
Man City 0-2 Tottenham
West Ham 1-2 Everton
Semis:
Chelsea - Everton (everton played with starting XI, chelsea had some injured players, but you know their backups arent bad either)
Arsenal - Tottenham (Tottenham pretty much starting XI, only backup gk, and arsenal with youngsters, def not a bad match)
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fa cup is overrated, the final is usually worth watching though, if it is a tight match like manu-arsenal. (not if its liverpool-west ham, sorry enron

)