G4 for a poor guy?

Hey everyone - i know these questions are always posted... 'should i buy this or that'..

but the thing is.. i need peoples advice.

I need to buy a mac desktop because my PC sucks, and my iBook is not powerful enough.

I'm considering buying either a G4 1.25 at $2,800 (New Zealand price) or a G5 1.6 at $3,800..

Now the thing is... im super poor. And it'll take me about 4months of serious saving to get a G5..

I could buy the G4 now/soon... but will the G5 come down in price?! if so - maybe in my budget ($3000-/+)?

I will be using the computer for learning DVD pro studio... (but that will take ages to save for too)

so - i could:
A) buy the G4 - save for a bit and get on with DVDPS
or
B) save for ages.. and ages... and then finally buy a G5.. then save a bit more then get DVDPS!?

Bahh, what to do... please lend me your experteese...

(also a side question... would a PC DVD writer [Pioneer A06] work in a mac?)

thanks in advance

 

oh and buying second hand is stupid cos people sell macs here like, "G4 800, standard, no extras. good. cond. $3000".

where youre like, 'umm... but brand new theyre... oh never mind'

or you get people selling "G4 800, not sure if its windows 98/2000"...