Thanks so your saying that a fan in the i3 is a nessecity?Fish said:i marshal and use a grey profiler and blue i3's... am planning on purchasing some white i3's... and yeah, the lense can be fiddly, and they are heavier, but they do look good and appear to have a reduced profile. i take it in turns to use both, love each the same. really its up to you; they both do the job... bear in mind, marshalling in hot days, slapping a fan in teh i3's is always welcomed