You'll love it. You don't see many complaints on this forum about Macs, just moans about PCs and Windoze.
In my home office I have 3 Macs - a Graphite G3 iMac, recently pensioned off and no longer in pride of place on the desk, but it did sterling work for 4 years.
A G4 Powerbook, lovely piece of gear but starting to look a bit slow. Two years old.
A G5 iMac with 20" screen, love of my life. Using Airport for broadband.
When I decided to get the G5, I didn't know the dual Intels were on the way, I was in too much of a blood rush to slow down and wait. No regrets, I have had 6 months of use before they were available anyway.