[quote name='Rocko']OTT, do I want to hook my computer up to my 27" 1080p LCD HDTV via VGA or DVI?[/QUOTE]
DVI is generally consider a better/higher bandwidth connection than VGA. It supports higher resolution levels.
Edit: Well it seems DVI limits your refresh rate to 60hz vs 75 with the D-sub (never knew that). So, try both- the D-sub might be better for gaming but you might need to use DVI to get full resolution.