So, I know these gear questions have been asked a million times but I like to hear what everyone thinks especially folks who have direct experience with the same scenarios. I'm looking to upgrade my gear to be able to take better pictures of my daughter's gymnastics meets. Let me put out a few facts... The goal: Better IQ. As in, more ability to crop, better DOF and less noise in the photo. (So I know I need better ISO and better glass). The problem: Gymnastics events are notoriously poorly lit, flashes are not allowed, you're often far away from your subject, and the action can be very fast. We recently attended a national event at the ESPN complex in Disney and I figured it would be pretty well lit but it wasn't. I still had to push the ISO up to 3200 just to get a decent shutter speed and that was still for underexposed grainy pictures on my gear. My current gear: Nikon D90, Nikkon 18-300, Nikkon 35mm, and Nikkon 50mm. The D90 has been (and still is) a great DX camera. I'm very happy with the 18-300 as a do everything lens but paired with the D90 the low light performance isn't the best. The 35 and 50 are much better but I generally have to crop so much that it defeats the better low light performance. From my experience the D90 doesn't do to well past ISO 1200. Upgrade path: (the obvious one) Nikon D800 $3k or Nikon D610 $1.9k Nikon 70-200 $2.4k (I've found 180mm to 300mm works fine for most gyms) (alternatives) Nikon 80-200 f/2.8 $1.3k (Nearly a grand off the 70-200. Is the IQ that much better on the 70-200 on the long end?) Nikon 105mm f/2 $1k (Would the increase in IQ be enough to allow for heavy cropping with this lens?) Tamron 70-200 f/2.8 $1.3k (is it comparable to the Nikkon? Are the compromises worth the savings? The older version of this lens sells for $700) Sigma 70-200 f/2.8 $1.2k (Is it comparable to the Nikon? Worth the savings?) What about adding a TC? Would that significantly degrade the low light performance? I'd love to hear any comments or similar experiences. I'm sticking with Nikon bodies so while there are great alternatives there's no need to mention any. The Nikon 200 and up primes are out of my price range. Are there any other alternatives to getting the low light performance I'm looking for? I'm happy to go FF and will obviously use the camera and lens for many other purposes. It looks like gymnastics is going to be a big deal for us so I anticipate shooting a lot during my daughters meets. I've shot for 2yrs with my current kit and there's no way around the fact that it's not up to the low light/no flash task. I'll consider used or refurbished and I may try to time my upgrade for when a replacement to the 800 or 610 comes out to snap up the "old" model if the prices come down. Thanks for the inputs.