I think so - but I guess it's a personal choice!
I didn't have BMW Aux Lights, but I added a EZCAN and Denali D4, and the Horn (not the Mini horn, the big bertha!).
A couple of things I really like...:
1. I run the Denali's on 20% brightness during the day. I find it really works well with the LED "C" in the GS's daytime-running mode. I followed my brother (in his car) a while back, he said it was really good for visibility. When I flashed my headlight at him (to advise I was turning off) he said the "full blast" of the BMW standard LED headlight, plus the two Denali's on 100% was really really eye-wateringly bright!
2. I have mine wired so the Denali goes dim when I use the indicator (just the side that's flashing). Personally I like this (for the same reason I and other DON'T like the new turn signal/brake light on the rear of the new bikes). In my opinion this is a valuable bit of safety to make sure my indicator is clearly seen.
See 12:38 onwards here
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As you see there's also a load of gimicky stuff you can do with the config too (I haven't bothered)
On my Guzzi V85TT I bought some cheapy LED's off ebay. After a long winter ride in foul weather and the much-needed wash after, one of the cheapy chinese lights filled with condensation and packed in. "buy cheap buy twice" I guess... So I have ordered some Denali S4 for my Guzzi (NEC bike show special discount!!!) as well