"do Dells have a recovery partition on the HD or is it simply a case of them supplying the Windows disk?"
In my case of an XPS and an Inpspiron I got both. An OS disk and a recovery partition.
Dells PSU's are under-rated, they rate them on sustained output rather than peak.
Take the £429 option opt for the X2 6000 dual core and add an extra DVDRW drive taking your total to £499.
20 inch flat panel monitor
Athlon X2 Dual Core 6000
2 GB RAM (Dual Channel)
500GB SATA HDD
2 DVDRW Drives
128MB HD 2400 Pro graphics card
Keyboard & Mouse
Built in Card Reader
Onboard 7.1 Sound
MS Works 9
Vista Home Premium