It looks to me like the studios (two desktops, two laptops and the mini) all have either HDMI + VGA or HDMI + DVI-I.
DVI-I has all the VGA signals, you just need the cheap passive adapter dongle.
http://www.dell.com/content/products/productdetails.aspx/desktop-studio-slim?c=us&l=en&s=dhs&cs=19
By the way, did you look closely at the Studio Slim?
Blu-ray Disc burner, HDMI, TV tuner, 1394, 802.11n, Q9550 CPU (quad 12MB L2, 2.83GHz, 1333FSB), 8 GiB RAM, eSATA, 7.1 sound, Intel® GMA X4500HD with built-in support for full 1080p high-definition video playback, including Blu-ray* disc movies, 3.5" SATA (up to 1 TB), PCIe x16 slot for graphics, two PCIe x1 slots, one PCI slot, three 3.5" drive slots / two optical slots (4 total)
$869 for Quad 2.33 GHz, 4 GiB, BD-ROM/DVD-RW, 640 GB, ATI RADEON 3450 HD 256MiB, Vista 64-bit.
$549 entry price