Who uses quarantine tanks?

[whosinpower]

Hi all;

Newbie here just in the process of setting up a saltwater tank - reef with a few fish.
I'm filling the tank as we speak with RO water.
Liverock arrives late next week.
I'm going to cycle with liverock and had anticipated 4-6 weeks wait time, give or take.

I read all the posts about quarentine and it got me to thinking that perhaps I should have a small tank set up as well as a quarentine tank when the day comes that I can finally have livestock. I think I'd rather be safe than sorry.

Anyhow - my question is this - would it be wise for me to set up the quarentine tank at the same time, so that when my display tank is cycled, then the quarentine tank will also be cycled and ready to receive stock????

Or....would it be ok if I put some filter media in the sump of the display tank while it was cycling and when the cycle was complete....then drain some display tank water into the quarentine tank with the seeded filter media? Would that work, or would I still have a cycle to deal with in the quarentine tank????