Hi all. I'm new here, so as many members can assume, my first post will be about lens decision. I need lens for daily usage, but also for sports photography. I'm on a tight budget. So, I ended up with two options, slow AF, heavy, Tammy 70-200mm, with fast 2.8 or the best deal by many reviewers, Tammy 70-300mm 4-5.6 VC USD. I can get used (3 years old) Tamron 70-200 for around the same price as new Tamron 70-300 VC. What to choose? I know that 70-200 has slow AF, but 2.8 is great for subject isolation, sports for example, but on the other hand 70-300 has better AF, but OK-ish f5.6 at 300mm. No so spectacular for subject isolation. But, it has great VC, which can be handy for other types of photography. So, can I get a little help here? 70-200 is twice expencive as 70-300 here (new ofc). Is it twice better? Any better? Tnx in advance. Cheers.