ETF Targets and the STI

Currently I'm looking at 2 shares that I will be putting down money in once the market stabilises.

1.) streetTRACKS STI ETF

Current Price: $3.27 (STI closed at 3197.37 today)
Level in which I will enter: When STI reaches 3150.

Reason for buying the share:
1.) Annualised 7-9% growth over the past few years
2.) Provides a steady, yet low risk (comparatively) investment in Singapore's economy.
3.) Gives capital gain + steady dividend
4.) Much cheaper (management fees wise) than buying into the comparable unit trust (Aberdeen Singapore equity trust), and gives better returns than that unit trust (and comparable ones)

Cons:
1.) As compared to Unit trust, where i have to pay only 0.75% sales charge, the brokerage fees (two ways) add up to $50, which is 1.5% of 1 lot- $3270.


2.) iShares S&P 500 USD10

Current Price: USD 120.460
Level in which i will enter: USD 118-119

Reason for buying the share:
1.) The US economy, despite being in the doldrums now, has historically always been a world leader. Hence, even though capital gains might not be as fantastic as the glamorous emerging economies, it provides a stable, and comparatively low risk investment with good capital gains and dividends.
2.) Diversification of my fledgling portfolio into a developed country first (stable)
3.) US Dollar is at an all time low with the SGD now, I feel the USD has very little downside potential(is that the correct term? What i mean is that it can't sink that much lower), just like the AUD has very little upside potential (Can't go much higher), and i might gain once USD appreciates vis a vis SGD.  (abit of forex gambling here, no?)

Cons:
1.) not liquid. difficult to sell off as a result.
2.) Not as much funds in this ETF as compared to SPDR S&P500. Hence tracking error higher

Why i'm buying this instead of the SPDR
1.) both iShares and SPRD are secondarily listed on SGX- however, SPDR is EXTREMELY illiquid on SGX. iShares still has daily trades with vol. from 2000 to 10000.
2.) I could buy SPDR on the NYSE Arca- BUT, i have to pay a higher brokerage fee AND a monthly custodian fee of 2.14 SGD. These extra fees come up to 14+ SGD and 14 USD extra brokage fee (SGX 15USD, NYSE 29USD) and this is more than 2% of my interest (i would like to invest 100-150 shares). Means that i will lugi 2% the first year. I'm willing to sacrifice some liquidity (SPDR is very liquid on NYSE) for the cost savings.

KIV:
Lyxor emerging markets ETF
Lyxor MSCI World ETF