Mac Mini or 2nd hand Power Mac

I am comign from Windows but had an iMac G5 the first intel ones but I am looking to buy a new/2nd hand Mac.

However I need to have windows available to me in one form or another.

First I am thinking down the lines of a Mac Mini Dual core so that I can do
Bootcamp.

However the other option would be a power Mac which I could have XP as a VM 3d graphics is not needed either way.

The Mac Mini I would get new a 2ghz one.

But have seen second hand Power PC's with 2.0 dual CPU's with 2-4 gig of
ram and a good graphics card.

So what would you suggest I do a lot of Web Design but not too much in the graphic department and general films, music and browsing

Price is a big factor

Thanks

Tim