Best QD? DP Final Gloss, OID, or FK425?

Has anybody tried Griot's Speed-Shine? I have, it's definitely worth a try.
 
I finally counted yesterday that I have 6 QD's plus ONR and OCW. I have a 1/2 gallon of a QD that I no longer use and there appears to be something growing inside the bottle. Buying too many products can have its downsides. :laughing:

I switched to OID about 7 months ago. It doesn't streak, lubricates my paint during car wash drying, leaves a nice slick finish that gets more slick over 12 hours, and has a very nice gloss finish. It smells nice too...

I have tried neither DP Final Gloss nor FK425, so I defer to those that have. FK425 is on my to sample list, but I have a year supply of OID.
 
I bought some FK 425 and was using PB's QD+ and 425 is better in gloss and slickness.
 
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