If you're afraid of building your own PC and you don't know which components you want, you can start with something like a Dell Studio XPS 8100 or Inspiron 580. These have the Intel H57 chipset and the LGA1156 processor socket. You want a Core i5-750, Core i7-860 or Core i7-870 quad-core processor for that socket, not one of the lesser dual-core processors available (e.g.: Core i3-530 or Core i5-660). If the budget is tight, a refurbished model from the Dell Outlet store is a bargain.
Studio XPS 8100:
Dell Factory Outlet
Inspiron 580:
Dell Factory Outlet
If you're shopping for new Dell systems, they usually have good prices for the base system, but they overcharge for upgrades like memory, hard-drives, Blu-ray and graphics cards. You can pick up these items much more affordably from e-tailers like Newegg, Amazon, ZipZoomFly, Directron, etc. and easily add them to a system that you purchased from Dell.
If you know which components you want in your PC and you just want someone else to assemble it for you, there are folks like CyberPowerPC that let you choose exactly which components you want to use. If the budget is tight, then an AMD processor + motherboard + integrated graphics could save you some money.
If you're up for putting it together yourself (it might take you half a day), you can buy your components on-line (from Newegg, etc.) and put them together for slightly less money.
Here's an example:
AMD processor + motherboard + graphics:
$100 AMD Athlon II X4 635 quad-core 2.9 GHz socket-AM3 processor with HSF
or $200 AMD Phenom II X6 1055T six-core 2.8 GHz socket-AM3 processor with HSF
$100+7½ Gigabyte GA-880GMA-UD2H micro-ATX 880G+SB850 socket-AM3 motherboard
$0 integrated Radeon HD4250 graphics
or add-in PCIe X16 graphics card
or Intel processor + motherboard + graphics:
$200 Intel Core i5-750 quad-core 2.66 GHz LGA1156 processor with HSF
or $280 Intel Core i7-860 hyper-threading quad-core 2.8 GHz LGA1156 processor with HSF
$120 Gigabyte GA-P55-USB3 ATX P55 LGA1156 motherboard
$80 HIS Radeon HD5570 low-profile PCIe X16 graphics card
Memory:
$230 8 GiB = 2x 2x2 GiB PC3-12800 G.Skill F3-12800CL7D-4GBECO (DDR3-1600, CAS 7, 1.35V)
or $194 8 GiB = 2x 2x2 GiB PC3-10600 G.Skill F3-10600CL9D-4GBNT (DDR3-1333, CAS 9, 1.5V)
or $265 8 GiB = 2x4 GiB PC3-10600 G.Skill F3-10666CL9D-8GBRL (DDR3-1333, CAS 9, 1.5V)
Storage:
$110 +7 1½ TB Western Digital WD1501FASS Caviar Black hard-drive (for OS, programs and storage)
or $60 ½ TB Western Digital WD5001AALS Caviar Black hard-drive (for OS and programs)
and $120 2 TB Western Digital WD20EARS Caviar Green hard-drive (for storage only)
$25 +3 Samsung SH-S243N DVD-RW
or $98 Lite-On ihes108-29 Blu-ray ROM / DVD-RW with PowerDVD
Case + power supply:
$90 Antec NSK4482 with EA-380D PSU
Operating system:
$100 Microsoft Windows 7 Home Premium 64-bit OEM
or $135 Microsoft Windows 7 Professional 64-bit OEM (for remote desktop)
Input devices:
$35 Microsoft 69C-00006 Wireless Laser Desktop 5000 keyboard & 5-button mouse
or $60 + 9 shipping Logitech Cordless Desktop LX 310 wireless keyboard & 5-button mouse
Speakers:
$50 -10 Logitech Z313
Monitor:
$431+tax:
UltraSharp U2410 H-IPS
$239+tax:
UltraSharp U2311H e-IPS
$223+tax:
UltraSharp U2211H e-IPS
$360+10 shipping
NEC EA231WMI e-IPS
I hope that some of these components suit your needs or inspire you to select the ones that work best for you.
P.S.: There are numerous PC enthusiast forums available to help you if you choose to build your own PC. Stop by the
Tech Report system builders' anonymous forum if you want more help.