I'm looking for a little computer advice at the moment if anybody a little wiser could help.
My current home computer is starting to show signs that the end may be nigh, it has frozen
a few times and shut itself off twice. I have no cause for complaint as it has offered fault free
service and fast start ups for the last 4 years. It's a Dell XPS 8500 with the following spec:

Memory 8192MB (4x2GB) 1600MHz DDR3 Dual Channel
Video Card AMD Radeon™ HD 7570 1GB DDR5 Graphics Card
Hard Drive 1TB Serial ATA (7,200 rpm)
Optical Devices 16x DVD +/- RW Drive (read/write CD & DVD)
Sound Cards Integrated 7.1 with WAVE MAXXAudio 4

I want to make the plunge and upgrade with something off the Dell website again.
Budget is in around €800/900 without a monitor. The problem is I'm clueless when
it comes to reading computer spec. If anybody who's knowledgable about such stuff
would be able to spend 5 minutes browsing the Dell desktop section and maybe pointing
me towards something I'd be eternally greatful.

http://www.dell.com/ie/p/desktops?s=dhs&~ck=mn