a iMac G5 hmmm thats a tricky one
stay away from the 1.6 ,1.8,2.0 models they suffered from the bad caps problem ,
which can be expensive if you cant solder yourself or know somewhere to get it done cheap ,
they also have failing lcd panels and graphics (starting with lines on the screens ending with a black screen )
not to mention overheating issues as the heat compound is getting older and the psu failing
the later isight model 1.9 and 2.1 are a little bit better ,
but still have failing lcd panels and isight cams stop working ,failing psu's
and the heat issues , the G5 is just not a cool runner anyway
and apples design of the iMac didn't really help to cool down the G5 and could barely manage the heat
despite the chances of the iMac g5 failing soon the prices are high ,
but the early intels are not much better ,
follow up ebay for a couple month and you will see what i mean
if you can live with a G4 and a 17 inch crt
look at the eMac 1.42 superdrive models,
because they came with 160 gb and ati 9600 64mb graphics ,
they had been introduced in mid 2005 and sold until 2006
are a much safer bet if you plan to use the Mac longer and dont have a huge budget
then you can grab a nearly as new eMac 1.42 for the fraction of the price and
it wont be that much slower compared with the G5 iMacs ,
the G4 processors are much much underrated
make it easy if you place a eMac 1.42 in front of me and a iMac g5 2.1 20"
i will always grab the eMac 1.42 ,
as" i " like to stay on the save side and do not like spending money on things likely to fail
and i just would not bet on a iMac G5 lasting long , there are some outside working steady but ........i just would not bet on
another contender would be a Mac mini G4 1.42, cheap to grab up and just buy a 20 inch or bigger monitor for it or a lcd tv as the modern lcd tv all have some sort of port for a computer vga /dvi/hdmi as i have one connected to a lcd tv
and i have 3 eMac's ok one had a failing superdrive but they are failing in iMac G5's too