Helped my father the other day to pick out:
20" imac
1024 MB RAM (not from apple, but at my local and loyal store 🙂)
250 GB HD
Bluetooth
iPod 40 GB
Wired Keyboard and Logitech mx510 mouse
Just gone stock as I'm buying from a reseller, Apple UK generally suck IMO.
20"/1.8/256/160GB/SuperDrive
Gonna be adding extra 512MB STRAIGHT away, possibly going up to 2GB later on (depending on if a friend can sort me out 😉), if not I'll just grab another 512MB and pull the 256MB out to take me up to 1GB.