I'm a big fan of flushmount turn signals on the V-Strom. The stock signals stick out a long ways, and are easily broken. I'm willing to take the slight added risk by having the signals mounted in further.

These are Lockhart Philips Flush Mount I signals, black with smoke covers, and I use the harness adapters, which keeps me from having to cut or crimp any wires.

I use a nylon bolt and nut to hold the flush mount signals in place. This allows the signals to shear off in a bad crash, rather than tearing or causing the fairing to crack. They are 10-24, 1 inch long, with a slotted head- but you can use anything you find in the local hardware store. Simply drill a hole in the center of the turn signal plate (see pics below) and insert the nylon bolt. Place the turn signal against the bike, add a large fender washer and nut on the inside of the fairing, then connect your wires. No modifications to the bike are necessary!

I don't know of any good online suppliers for these items. Take the part numbers to your local dealer and they can order them for you.

The DOT standard says the following about front turn signals on a motorcycle:
"At or near the front - 1 amber on each side of the vertical centerline at the same height, and having a minimum horizontal separation distance (centerline of lamps) of 16 inches. Minimum edge to edge separation distance between lamp and headlamp is 4 inches."