I suppose your are interested in com/net/org. The market and related options are very simple.
Option 1
The domain is backordered on 1st tier services: waste of time using other services
Option 2
You want to register a domain and you are the only one interested in that domain: any service is good so the best is the cheapest one
Option 3:
The domain is not backordered on DC and SN: why don't submit the domain to all the other services? Backorder submittion is free until the domain is not captured.
Who is the best in this case? I will put on the same level Dynadot/Hexonet/Sav. A step below Godaddy.
But how often your domain belongs to the third option?