Suggestions for the best value for the money on desktops right now?

I work as an office/network manager of a small (13 desktops and a server running Windows Server 2008 on a network) church office and have FINALLY been given approval for purchase of 6 desktop pcs and a couple of laptops. I want the desktops to have 6-8 GB RAM, 300-500 GB HDDs, Windows 7 professional 64-bit OS and preferably no added junk or at least the option to have the added junk removed before delivery. I don't want CHEAP computers, but I do want machines that are good values for the money spent. We have been using Dell Optiplex GX 260s, a couple of Gateway dinosaurs, and a couple of AVA-direct-built pcs over the past 3-12 years and have had few problems with them. As each has crashed, I have done two image restores and/or backup restores, given each a new hd, put in updated network cards and/or video cards, maxed out their memories, and then gave each a couple more image and/or backup restores... in other words, I think I've squeezed enough blood out of these turnips. Working for a small church environment, though, I want to make an informed decision on the purchases and be a good steward of the church's limited resources. I have had great experiences with both Dell and AVA-direct. Do you have any suggestions based on your personal experiences? Thanks in advance for your consideration!
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Aaron TomoskyDirector of Solutions ConsultingCommented:
Dell optiplex or even vostro. Great deals on 1st gen i7 processors right now.
Have to agree Dell puts out great deals on the desktops and laptops then tack on the 3 year nbd warranty.
look at the warranty period, and support options too.
for the rest - Dell is known for "the best bang for the buck"; and right now, i'd say they all are ok.

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Debb1OAuthor Commented:
I have much to learn about computers, but after doing some surfing around, I found that specifically the WD Caviar Black 32 MB cache, 3 Gb/s, 1 TB (and their 64 MB, 6 Gb/s version) to have excellent (and many) reviews. Also, It seems that it things may be headed toward USB 3.0 over eSATA (although, I am going to go ahead and get my desktops with both USB 3.0 and eSATA ports {b/c I already have a cable, SATA drive and drive dock}).

I have ASUS in both of my AVA-direct-built computers and am satisfied.

I now just need to see if AVA-direct or Dell can give me the most bang for the buck.

Thank you all for your answers.
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