This is really my first desktop mac (Aside from the 300mhz iMac i used for a few months last year to get the freel of OS X).
Its exactly the same spec as the one you plan on buying.
Specs when I bought it:
Dual 867Mhz G4 7455 Processors
1gb DDR Ram
Geforce 4 MX Graphics 32mb VRAM
80gb Diamondmax Plus 9 HDD
Combo Drive
17" ADC Apple Display
Now:
Dual 867Mhz G4 7455 Processors
1.5gb DDR Ram
ATi Radeon 9800Pro (Flahed)
80gb Diamondmax Plus 9 HDD
2x 40gb Maxtor Fireball slimline HDD's in RAID0
8x DVD DL Drive
Combo Drive
17" ADC Apple display with the converter box
The original kit cost me £480 including shipping, which I think was a very good price.
I've spent about another £250 upgrading it, although I had the extra ram, DVD DL drive and hard drives lying around from my old PC.
It does everything I want it to do, and it does it faster than my 1.33ghz iBook does
Oh yeah, I'm overclocking it next week.