Narrowed down to top 3 Colored Coin options for stock sales

[Elwar]

So I am looking at Open Assets, Colu and CoinSpark for handling stock sales (not looking for Alt coin solutions, do not advertise in this thread). Here's where I stand on each one.

Open Assets:
positives-
Simple, it has a lot of support, Gyft and Overstock are using it as are several other ventures.
negatives-
I don't tend to see a lot of activity on it in the past few months

Colu:
positives-
Released their new protocol, similar to Open Assets but has support for storing meta data in torrents which is great for further decentralization.
They own coloredcoins.org which people likely assume is the central place for all colored coins so it might become the new standard based on just that.
negatives-
Someone on their Skype board mentioned writing an alt coin for the protocol(?). I'm not sure what that's about but I'd hate for it to evolve into a Counterparty/NXT type of solution.

CoinSpark:
potitives-
Similar to Open Assets, seems to be used quite a bit and I like that it is written in programming languages that I know well.
negatives-
Does not seem to be adopted as much as Open Assets and doesn't have a web client (which I might just write myself anyway so not that big of a deal).


Are you considering using one of the protocols or do you use one already? What are your thoughts on each one?

*Again, not interested in Counterparty,NXT,Ethereum,Factom or any other alt coin solution. Posts about solutions other than these 3 will be deleted.*

[LiteCoinGuy]

iam not using any kind of colored coins at the moment but Open Assets sounds promising because of the support of some players (overstock etc).

(thx for the summary)