Budget?
I have a compaq very similar to the link below although after 2 years i have just upgraded to 1.5gb memory and a 7800GTX Nvidia graphics card. excellent machine, never had problems, there also owned by HP.
http://www.pcworld.co.uk/martprd/sto...ory_oid=-15245
Personally id go for this package below, but it all depends on budget
http://www.pcworld.co.uk/martprd/sto...ory_oid=-15245