Coin line:
: 114 gold/180 seconds
: 180 gold/180 seconds
Shield line:
: 100 gold/180 seconds
: 160 gold/180 seconds
Using base gold values for minions here. Remember that melee minion gold scales +0.2 and cannon minion gold scales +0.5 every 90 seconds after the minion spawn.
Edge line:
: 126 gold/180 seconds
: 216 gold/180 seconds
Are values are calculated assuming optimal play, meaning they are best-case values.
qetzel1 votesAlthough remember that the Shield line gives the ADC sustain and helps push the lane when needed.
The Edge line gives bonus damage.
The coin line doesn't grant any benefits like these.
ProfDrDeath1 votesCoin line gives decent self-sustain and, on the later upgrades, flat MS (which is very hard to find outside of boots). On top of it, it has the best active.
Shield line gives sustain and pushing and has a decent active, especially for protect comps/against single-target comps. Plus, it has the most universally useful stats.
Edge line gives bonus damage on-hit, which works well with poke. Additionally, it gives AP, which can amplify both offensive, defensive and utilitarian aspects of a champion. The active is still decent for catching people out.
My personal feeling is that melee supports (and possibly Thresh) will still go Shield, as it has the best stats for them (melees need tankiness). Supports that have a decent way (both in their own kit as well as in the match-up) to proc the Edge line's passive will go that route (i.e. Morgana), while those that don't have such a thing will probably prefer the more guaranteed income of the Coin - especially now that there is not as much a difference between the optimal usage amounts of the Tier 1 items. For me, Janna is a prime example of this.
Partholonian2 votes
will probably also go coin, because the self sustain is awesome for her in particular. In fact, I usually go coin on her now, I just have less gold because of it, but it's still better than dying trying to get a proc when your kit isn't well suited to it.
I welcome these buffs, but might like to see an offsetting buff to 
, specifically the unimpressive active. More range or missile speed maybe? Or even a wider area. Attack the "start , then sell it for 
" problem from both ends, and encourage picking either line and sticking with it.
Miku Lv991 votesNomad's really gives 360 gold/180 seconds? That's so much more than the competition that it just seems like the best item now. I can't believe it beats the others out by that much though. In any case, after the coin buffs, I expect a lot more of the champions that can play passively like Soraka and Janna to start coin a lot more often. That new Talisman is ridiculous especially with the 20% cdr for free from intelligence, already giving it only a 32 second cooldown.
ProfDrDeath1 votesThanks, my bad.
Was supposed to say 180/180 seconds. That's what you get for wanting to do Relic Shield accurately...