Seedling Plug - Which Ones To Use

Hi -

I have a 10x20 Hot House Propagation Kit w/heat mat
What im asking is, what growing plugs are thre b est for cannabis seedling germination... im looking at these two though...

ReadyGro 1.5x1.5 organic grow plugs or the Jump Start 100% Coconut Fiber Grow Plugs

or are there better ones to use

thanks

I like jiffy pellets.

Rapid Rooter has worked the best for me; I've tried many.