I'm going to throw in my two cents since I am somewhat a lighting fein.
First, concerning Aux Lighting, you first need to decide what you need is for the lighting. If you need more reach on the high beam and use fog lights, it is like showing up at a road race with super swampers on your car, doesn't matter that they are great tires for off roading and mud, wrong use.
Generally auxillary lamps fall into three catigories. First, Fog lamps/Cornering lamps. Properly designed, these offer a lot of light with a 180 degree spread, sharp vertical cut off, and maximum of about 200 foot range. These lights work well for fog (since they don't reflect back in your eyes), and filling in the gap between the car and the low beam headlamp that most cars experience. Accordingly, they make it easier to drive tight mountain roads where you can see the corners and side of the road more easily.
Next, are what are termed driving lamps. These lamps can be thought of as and intermediate beam, they tend to have a distance range of 200-1000 feet and about a 20 degree spread. They are often used to supplement low and high beams.
Finally, you have what are called pencil beams, which are a fine focus lamps, generally a spot witha very long throw (generally about 3000-5000 feet). These lamps work best on straight roads where you want to see a long ways at night. Generally I find them to be to spotty for most use.
That said, manufactures definitions vary widely, for example Hella 500 driving lamps are really a pencil beam. If you are looking for hellas, I would suggest you check Hella AG site as they have what is called a light tunnel which give a real light display of their pattern at night.
I personally am very fond of Cibie Lights. I have used the Cibie Oscar + (driving pattern) for the past 3 years on a Nissan Pathfinder to supplement the high beam and they work wonderfully. I ordered my Cibies from Cibielights.com (as a note, if you want to see what the baja racers run, go to aardvark international at cibieusa.com and check out the Cibie HID conversions they do). I would also recommend hella lights, but not their entry level 500 lamps, which are not near the same quality as the 1000, 2000, and 4000 lamps. PIAA in their large lamps (40 and 60 series) are known for their high quality, note that larger reflectors allow for much higher light output than the little lamps so many people use now.
All of that said, I just upgraded the lighting systems on the LC. I purchased the upgraded wiring harness from Slee Off Road and ordered hella 80 watt low and 100 watt high beam bulbs from rallylights.com. This upgrade signicantly increased the output of the stock lights, which frankly are not bad compared to some of the lights I have seen on cars. They still don't compare to the great pattern beams that our overseas brethren get, but well worth the $90 investment. I would suggest trying this before adding lights and then if you still have a need for auxilary lights, assess what the need is and then purchase the proper lamp for the application.
Good Luck
Cary