For your information, Starhub is currently the most prefered ISP
in Singapore.
Read survey/report 
http://asia.cnet.com/promo/gbd/gbdreport.pdf
And personally, I have been using Starhub Express for more than 4
years and it is still working well.
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Technically speaking about transmission mediums,
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1. Coaxial cable is always more reliable than a Unshielded Twisted
Pair (UTP).
Extracted from http://en.wikipedia.org/wiki/Twisted_pair_cable
UTP cables are not shielded. This lack of shielding results in a
high degree of flexibility as well as rugged durability. UTP cables
are found in many ethernet networks and telephone systems.
Extracted from http://en.wikipedia.org/wiki/Coaxial_cable.
It is used as a high-frequency transmission line to carry a
high-frequency or broadband signal. Because the electromagnetic
field carrying the signal exists (ideally) only in the space
between the inner and outer conductors, it cannot interfere with or
suffer interference from external electromagnetic fields.
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2. The best is obviously fiber optic cables, but only the
super-rich can afford them. Laying a fiber optic cable from your
ISP to your home may cost you several hundreds thousands of
dollars.
Extracted from http://en.wikipedia.org/wiki/Optical_fiber
Optical fiber can be used as a medium for telecommunication and
networking because it is flexible and can be bundled as cables. It
is especially advantageous for long-distance communications,
because light propagates through the fiber with little attenuation
compared to electrical cables.
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3. The worst is wireless network connection. Rather unstable and
vulnerable to signal jamming.
Extracted from http://en.wikipedia.org/wiki/Wireless_computer_network
Wireless networks, in terms of internet connections, are
typically slower than those that are directly connected through an
Ethernet cable.
A wireless network is more vulnerable because anyone can
try to break into a network broadcasting a signal. Many
networks offer WEP - Wired Equivalent Privacy - security systems
which have been found to be vulnerable to intrusion. Though WEP
does block some intruders, the security problems have caused some
businesses to stick with wired networks until security can be
improved.
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I hope this information is useful for you. 
