So as far as my portfolios go (cash, RA and pension aside):
Portfolio 1:
My very portfolio evolved into this but I do not contribute to it anymore.
SYGWD, NFEMOM, PTXTEN (40/35/25 split)
Portfolio 2 (TFSA):
CTOP50
PTXTEN
GLPROP
STXEMG
SYGWD
Except for cash and bonds I don't think an ETF Portfolio can be diversified any better and it's doing very well atm.
Portfolio 3 (Stanlib unit trusts):
Diversified Equity Fund of Funds
Global Balanced Feeder Fund
...and I know certain bloggers are going to turn in their graves, but I do like those unit trusts and will probably move all of Portfolio 1 to it. They give exceptional diversification in my opinion and I'll probably convert that feeder fund into the true offshore counterpart next year some time.