The disadvantages of going for dell are,
i) They have Intel+DDRII combos.
ii) The warranty period is only one year. If you go for a 3 year complete cover it overshoots your budget by quite some distance(If you go for a assembled then, the monitor, proccy, mobo, RAM comes with 3 yrs warranty and the HDD comes with a 5 yr warranty. Just make sure you have good computerwaala who repairs the PC near your place and you are all set and done )

I would suggest two alteration in Anubis config
AthlonII X2 240 - 3k
Gigabyte 785GMT-UD2H 5.9k
Transcend 2gb DDR3 1333 - 2.4k
Seagate 250GB 7200.12 - 1.9k(As this is office PC 250GB is in itself a surplus)
CM Elite 310 - 1.5k
FSP SagaII 350w(80% efficiency)-1.6k/Zebby pro 350w(Make sure its pro and not platinum series bcoz platinum seriesx is watewaste)-1.5k(As Gannu said)
Logitech Mouse/KB - .7k