You can get exactly what you want for easily under $1000. Also, you pick all of the parts, so you get what you want and don't pay extra for unneeded things. You also get Half-Life 2 and 2 months of Napster for free. They put it together for you, so you don't have to worry about that.
You can get yourself a system like the one you want for $479.00 after the $100.00 MIR. I don't think It has a firewire port ,but overall it's still a very good system specially at that price.
Dimension 8400 desktop w/ new Intel P4 3GHz HT 2MB Cache, Free Dell 17in 1704FPT digital LCD, 512MB DDR2 at 400MHz, free 80GB SATA, CD-ROM, 128MB ATI Radeon X300SE, 5.1 Audio, Gigabit Ethernet, 1yr warranty, Word Perfect, XP Home for only $899 - $200 instant off - $100 rebate = $599 w/ free Shipping. Free Dell 720 printer.
go to www.xpbargains.com to get more details and the links.
This looks like an excellent deal. You can add a burner either from Dell, or buy one cheap from some place like newegg.com.