I also agree with Camerons :
Have you thought about building it yourself or having something built completely to your specifications as this would give you a lot more flexibility?
As for if you build it yourself, and get the parts from a good honest parts provider you wont get ripped off.
Building a computer these days is pretty simple. Far easier than when I built my first 286 computer in 1989 out of good parts from dead computers when I couldn't afford $2500 for a new computer, and I had a mixture of 8088 and 80286 guts to mix together. This was before Plug-n-Play and so you had to set jumpers, and dip switches, for IRQ's etc and mess with Autoexec.bat and Config.sys with DOS. And in 1990 I lucked out and found a BocaRAM ISA Memory Expansion Board in a dead system that when plugged into the 16-bit ISA slot it brought my systems memory from 1MB to 4MB. Here is a link to that board... looking at the ad now, I didn't realize that I could have installed 32MB of RAM to this board and potentially had an over kill RAM spec'ed 286 ...LOL
http://books.google.com/books?id=xDAEAAAAMBAJ&pg=PT19&lpg=PT19&dq=BOCARAM+AT+I/O+PLUS+4mb+ISA&source=bl&ots=2FHVBttq5_&sig=XFjaYaDlfVhDjuifHX1-KEck9_Y&hl=en&sa=X&ei=zMJvU5qzNOvmsASfg4DYDw&ved=0CCcQ6AEwAA#v=onepage&q&f=trueI still remember playing Wolfenstein 3D on this system the September 1992 from a shareware copy of a copy of a copy from friends to friends to me..LOL
There are many how to videos on youtube to view before you get your hands into the hardware too if you want to know what to do etc, if you decide to build your own. Most motherboards these days do not require any jumper changes as for the default jumper settings are correct for 99% of the configurations out there. Memory is keyed with a notch and will only install one way, as well as everything else these days is also keyed so you cant install it backwards unless extremely forceful to fight it out with the connection.
Personally I enjoy building a new system from the ground up. I also like to save money and not pay others to do something that I can do myself.
When it comes to custom built systems, you have to be careful as for some businesses will try to make a system look like a great deal and its a good CPU with the rest of the guts low quality and so the system works for1 year and dies and none of it is in warranty, while another better system builder will avoid motherboards like Foxconn, Asrock, and MSI and stick with GigaByte, ASUS, and Biostar for builds.
Note: Biostar is an OK brand, however their boards are OK for normal builds. If you plan on overclocking, even though many Biostar motherboards will support overclocking, its best to go with GigaByte or ASUS for boards that are going to be driven hard. I have owned many Biostar motherboards with no flaws in the last 10 years, however I was warned by a person about pushing the boards too hard with overclocking because the VRM's may overheat near the CPU. However if its a Biostar with heatsinks on the VRM's ( not common to find on Biostar boards ) they can be driven harder with overclocks. I have 2 Biostar motherboards that have been running a 10% overclock however which are cheap $50 motherboards and they haven't had any problems. I did not adjust voltages or multiplier which is locked, I only overclocked the FSB some to gain 10% faster performance.
