Title says it all, I want a mod that is able to track the rebirth/ankh/soulstone cooldown for raid members ... I know CT Raid shows the rebirth cooldown (if I hover over their name) but I dont think it is accurate.

It is, more or less.

oRA2 (Ace slimmed down CTRA-compatible package that is all-around superior to CTRA) has a cooldown monitor that will show this without mouseovers.

Does it show the cooldowns without them having oRA2 aswell?

It shows the cooldown if they use oRA2 or CTRA or another compatible mod; it uses CTRA's data communication protocol, although honestly, at this point they could arguably start extending the interface, since they're the de facto standard for high end raiders, not CT.

I remember a few of our guild members using oRA2 but I'm always a little skeptical to change :p

We used to have CT Raid mandatory mainly for /raitem checks as well as the old CTRA Boss Mods - which really pale in comparison these days to DBM (aka La Vendetta) and BigWigs (though I think you have to pay for that now?).

I know a lot of our healers (especially those with multiple dispelling skills) use Heal Bot ... but I a simpleton Mage and just need the functions to effectively perform the "raid leader" duties.

So what kind of funtionality does oRA2 offer over CT Raid?

I like the Status box in CTRA that shows Preist/Paladin/Druid/Shaman mana as well as selectable "Raid Mana" and "Raid Health" percentages. Also shows the offline/dead/afk count.

oRA2 does everything CTRA did, minus the raidstatus, boss mods, and raidframes, and generally runs better in my experience.

For a raid status box, use XRS.

(BigWigs is still free, you're probably thinking of RDX.)