sf over a sl?

Hi. i was wondering if any of you choose a g2/6p over a scorpion or tl2?

I'd take the G2 over all of them, but that's my preference. What is it you want in a light?

I am a big fan of the G2 however I do change the lens out for a UCL from flashlightlens.com
Topper

but isn't the g2 not as bright as the scorpion? and would the g2 throw further?

The difference in performance between the G2 and TL-2 or Scorpion are minimal and you likely won't notice the diff in real world usage (FLR shows the Streamlights have more throw).
Between the G2 and Scorpion, I'd take the G2. It's more thought out.
Between the G2 and TL-2, I'd take the TL-2 (which I did). To me, the TL-2 is more attractive, smaller and more compact (fits easier in my pockets). It costs a bit more than a G2, but I like my TL-2 more than my friend's G2.

If you're only interested in xenon lights, also look into Nextorch and Wolf-Eyes as both offers pretty nice xenon models at low prices and both brands seem to be pretty nice quality (my Nextorch Z1 is very nicely made).