what's the best kind of water filter?

i'm after a good water filter for my drinking water. now a dr had mentioned drinking bottled water because it won't have copper in it.
i have seen a reverse osmosis filter - but is water from this kind of filter suitable for drinking?
more to the point, what water filter will remover copper? i have read that water filters that remove copper only remove copper for an initial time. the only one that'll do it is the reverse osmosis filter.

(what's a water purifier? do i need one of those?)

i dont really mind cost - i do need it to be long-term and simple maintenance and available consumables... i will probably be able to install it myself. any ideas? %)
http://www.psifilters. com.au/buy-online/category/40/reverse-osmosis/laundry-wall-mount-reverse-osmosis-systems. html

is this sort ok?
(copy link and take out the spaces)
thanks if you can help...

[shi1haz]

Yes, the RO system will remove cpper, lead, mercury and virtually all water contaminants to produce extremely clean water...much cleaner than bottled water.  It is recommended to use plastic pipes and fittings from the filter to your faucet, so that additional contaminates will not be introduced after cleaning the water.