As far as the combo drive goes, I'm not sure if thats possible, but an external firewire or usb one is a route your willing to take, then that may be ok. Also if you are to go that route Lite-On Cd burners work nativly with macs, and os x loves them. With the display I really don't know what to tell you.
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Mobile-2.2Ghtz Core 2 Macbook, 4GB ram, 160GB HDD
Server-Dual 1.42 MDD G4, 1GB ram, 4 random hard drives.
PC-C2D 2.4Ghtz, Asus Commando, 2Gb ram, 3 hdd's in raid 5, 8800GTS.