im looking for a nice vibrant red liquid color for plastics.

I recently bought a bottle from dead on plastix.  I shook it up several times. I added a lot of t to my plastic and it ended up looking orange once injected and cured. 

to save me from buying a bunch of different bottles, can anyone recommend a good red?

 

I like Baitplastics Tomato. DOP Redrum is good too. If you want darker/brownish red color look at DOP Brick too. Those are the only reds that I've tried so far.