Can someone guide me in the right direction

[pcguru101]

Hello, to all

i an wondering if anyone could point me in the right direction to buying the parts that would be compatible with my system here is what i have to work with and will inform of what i want to do in a sec
Dell XPS 400 Desktop Computer (Pentium D 820 2.80GHz/250GB/1GB)

Part NumberXPS400F1
General
Width 7.4 in
Depth 17.5 in
Height 17.5 in
Weight 34.0 lbs

Processor
Type Intel Pentium D 2.80 GHz
Cache Memory
Type L2 cache
Installed Size 2 MB
Mainboard
Chipset type Intel 945G
Data bus speed 800 MHz
RAM
Installed Size 1 GB / 4 GB (max)
Technology DDR SDRAM
Storage
Hard Drive 250 GB - DMA/ATA-100 (Ultra)
Hard Drive (2nd) 160 GB
Optical Storage
Type DVD??RW

Graphics Controller
Graphics Processor / Vendor NVidia GeForce 6800
Installed Size 256 MB
Audio Output
Type Sound card - Integrated
Speaker(s) 1
Telecom
Modem Fax / modem - PCI - Integrated
Max transfer rate 56 Kbps
Networking
Networking Network adapter
Expansion / Connectivity
Expansion Bays Total (Free) 2 ( 1 ) x External - 5.25 in , 2 ( 2 ) x External - 3.5 in , 2 ( 0 ) x Internal - 3.5 in
Expansion Slots Total (Free) 4 Memory , 3 PCI , 1 PCI Express x1 , 1 PCI Express x16 , 1
Interfaces 7 x USB 2.0 - USB 2.0 , 1 x DVI-output - RJ-45 , 1 x Headphones - RJ-11 , 1 x Microphone - VGA , 5 x Audio , 1 x Ethernet , 1 x Modem , 1 x Keyboard , 1 x Mouse , 1 x Monitor , 1
Power
Operational power consumption 375 Watt
Operational power consumption (standby) 375 Watt
Operating System / Software
OS Provided Windows XP Media Center 2005
Software Drivers & Utilities , McAfee SecurityCenter

sorry for the long list of specs but want to make sure i get all details in the first go around,

now for the list of upgrades i want to do

more hard drive space
more memory
better graphics card
add a tv tuner
better fans
need a better case
would like to add neon lighting

if anybody can help i would be so happy
if possible can you all add link to the recommended parts

thank for your time
chuck

[Cricket]

You want to upgrade a DELL? You'd actually be better off just building a new computer.

Adding more RAM and another hard drive will be pretty easy, but upgrading the video card is questionable due to the fact that DELL uses a power supply that is spec'd with just enough power for the stock system. Adding a powerful video card (if you're doing this to game with) will put a lot of stress on the power supply and you may end up with an unstable computer.

Is building or buying a newer computer an option?

Cricket

[pcguru101]

well i would like to build a computer from scratch but money is a major issue due to this recession that george w busch got us in but anyway maybe i will try to start building one after the first of the year any good suggestions of what componets to use. I would mainly be using my rig for movies games and the usual surfing the web

any help is grateful

[not important]

Come up with a budget and preferences & someone will help you with a build list.