Best ETFs for Balance Portfolio (fund, invest, stock, cost)

[Tops1234]

Hi all,

I am looking for what some of the best ETFs are to build a well balanced portfolio. I currently own SPY and DIA, however I feel they are a bit repetitive and am considering replacing my stake in DIA with another 1-2 ETFs. I am looking for a low cost ETF will some upside that will hopefully be relatively stable.

Any suggestions?

[Petunia 100]

Personally, I prefer to invest in broad market index funds. That means VTI (or some other total US market fund) and VXUS (or some other total intl stock fund). I don't know if you can say they are "relatively stable", but they do ensure you will capture whatever the markets will give, less expenses.