LED retrofits have basically 2 main problems: beam pattern and heat dissipation.
Beam pattern depends a lot on the host headlight. Projector types usually have better luck at working well than reflector bucket types, though nothing is guaranteed. Other than trying it yourself, you'll have to trust somebody that has tried the same LED retrofit bulb in the same model bike as yours. How you the rider see the beam pattern is also not the same as oncoming traffic sees it. I would stand 25 and 50 yd in front of your bike at night to judge how annoying you'll be to other motorists.
LED bulbs dissipate heat very differently. Halogen or HID/xenon light bulbs throw the waste heat the same way they throw the light output. For most installations, this is no problem, since you are very unlikely to want to block the forward path of the light throw. The only time you need to be careful is at track days, where you need to tape up the headlights. Pull the fuse is the best way to deal with that.
LED bulbs do not throw much heat forward. Most of the waste heat generated is at the power circuits, which is almost always behind the bulb. For a motorcycle, that area is usually pretty darn cramped and no easy path to conduct/dissipate waste heat away. If you don't bother finding a way to deal with it, your new LED light might work great... for a while, until heat builds up and burns out the power circuits. Some mfrs use fans to deal with rejected heat, which is fine, but you still need to make sure there is sufficient air flow path for the fan to do its job.
Personally, for the time being, I'd rather do the tried-and-true HID/xenon retrofit, than taking a chance with LEDs. I'm sure in time LED's problems will be sorted out, but right now it is still more of a crapshoot than I would want to deal with. Efficiency improvement with 35w HID is already significant compared to 55w halogen, and the light source is much more of the same point source as the halogen bulb, so beam pattern has a better likelihood of being proper.
If you do decide on LED, let us know how it works out.