Rallylights.com has the ecode lights...most places selling Hellas only stock the DOT approved H4 units.
http://www.rallylights.com/hella/5.75_lo.aspThe one you want is down the page a bit... HL71456 5.75" high/low beam unit with 60/55 H4 bulb. The one below it (HL79564) is the same unit w/o a bulb if you want to choose something a bit more intense. :)
If you get it, then choose the nice H4 bulb here:
http://www.rallylights.com/hella/H4.asp (HL78159)
At $8 for the bulb and $43 for the lamp housing, it's still a nice deal for all the improved light you'll get.
This is the same setup I ran for years on my FXRS...simply remove stock headlight and toss it...bolt in replacement and you're done. No need for relays, additional wiring and the increase is dramatic. You'll notice Rallylights is claiming even with stock wattage bulbs, the ecode Hella will give you 400% more light on the road in low beam and 200% more on high beam. I don't think it's *that* much (maybe with the 80/100 bulb?), but you will notice the difference!
I will say it takes a little getting used to...no longer will you try to illuminate the underside of every bridge you go under! :)
Note that I've also used a set of 80/100 H4's in 7" Hella ecodes in my Miata and absolutely loved that as well.
Cibie lights are supposed to be a little better than even the Hellas....but they are around triple the price if you can even find them.
Oh, and I never had a problem with them getting too hot in traffic. Heat is what makes Halogen lights work so well...the lamp has to get hot enough to do the chemical thing to have the halogen protect the filament from burning out. If anything, running them low on voltage will shorten their lifespan quicker than anything. However, heed the warnings...halogen bulbs must be spotlessly clean and absolutely devoid of fingerprints and skin oils. That will burn through the glass quickly! Handle them with lint free cloths by the base only as much as possible, and right before installing, wipe the glass off with alcohol on a clean lint free cloth.
Hope this helps! If you have any other questions, don't hesitate to ask.