Dell PE 2950 or HP DL350 G5?

Hello mates,
I am about to buy a new server for my company. But the point is that I am little confused and not much clear of what would be the best choice.

I have to decide between Dell PE2950 and HP DL350 G5 and the specs are as the following:

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-Dell GO FAST HIGH END PROMO PE 2950  (Rack Mount)
Processor:  QuadCore Intel Xeon E5405, 2x6MB chace, 2.00 GHz, 1333 FSB
Memory:       4 GB FB 667 MHz (2x2GB)
Chipset:        Intel  5000P
Optical:        CDR/DVD Combo
Storage:       1st Hard Drive 146GB, SAS, 3.5-inch, 15 000 rpm (hotplug)
                    2nd Hard Drive 146GB, SAS, 3.5-inch, 15 000 rpm (hotplug)
                    3rd Hard Drive 146GB, SAS, 3.5-inch, 15 000 rpm (hotplug)
StorageController:  PERC 6/i, x6 Backplane, Integrated RAID Controller Card
PowerSupply:      Two Hot Plug Power Supplies for Redundancy (no power cord)

-HP ProLoiant DL350 G5

Processor:  QuadCore Intel Xeon E5420, 2x6MB chace, 2.50 GHz, 1333 FSB
Memory:       2 GB FB 667 MHz
Chipset:        Intel  5000P
Optical:        DVDR
Storage:       1st Hard Drive 146GB, SAS, 3.5-inch, 10 000 rpm (hotplug)
                    2nd Hard Drive 146GB, SAS, 3.5-inch, 10 000 rpm (hotplug)
PowerSupply:      1000 Watt-CE

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These up are the technical specs but some friends of mine made me a little confused about what to choose cause for my opinion as i was in a way to get pc's from Dell or Hp i would certenally choice Dell.

Please, can any1 give me an advice of what to choose ?

I have to decide for about 2-3 days.

Thank you in advance
Losi