Ok. I've ridden for two days (long rides each day) with the risers. I put the road drops back on this morning for my commute. Here's my two cents:

Wide Risers
Pros:
1. more stable when skidding
2. more leverage when accelerating from a stop and climbing hills
3. upright position
Cons:
1. wrists get tired/sore from being in one position for too long
2. can't really get used to the aesthetics
3. a little scary splitting lanes (but totally do-able)

Road Drops
Pros:
1. multiple hand position options
2. less wrist fatigue
3. feels more "nimble"
4. like the look of them
Cons:
1. less leverage for hill climbing
2. less upright sitting position
3. feels more "twitchy" when skidding


In summary: Both bars have their pros and cans, and all things being equal, I like both wide risers and road drops for my street-track bike. However, simply based on aesthetics (which is utterly subjective) I'll stick with the road drops. Maybe I'll consider building another bike (thinking Cinelli Histogram or Parallax) so I can have one with wide risers and one with road drops