Quality BCAA's

This is not a thread to debate the effectiveness/worthiness of mega dosing BCAA’s. I have decided to try (using CT’s guidelines) but I will be honest, I don’t know a lot about BCAA quality/suppliers/brands.

I HAVE and DO use Biotest - and I know that they have a VERY nice product, it is just a little expensive to solely use for mega-dosing.

I am not looking for links or prices, I just wanted to ask… is there a huge difference in general quality from brand to brand? What do other people use to supplement Biotest?