I made the choice to go singlespeed after an experiment at Addison Oaks trails. I rode the trails using all the gears and averaged 11.7 mph, then rode the trails using only one gear (34 x 16) and averaged 12.6 mph. Singlespeed is a totally different ride - you maintain speed and power over small hills, but can't pedal on downhills, so you end up with a more consistent speed, but an inconsistent effort.
The bike was a bare frame 4 days ago. A quick hunt around the garage turned up a bunch of spare parts, which became the bike you see here. Looks so clean.