Best of four ECNs for algo trading?

Hi

I will appreciate your exp' advise regarding using API trading with ECN. (Based on algo')

FXCM (commission based on volume, with no markup)

Hotspotfxi

Autobahn (DB)

Currenex with prime broker (UBS or others)…

BARX

…..????

Also If you had exp' also using algo with others…please give us your opinion.

Account size & volume its not the issue,

Autobahn (DB) is not an ECN they are a market maker!

Thanks for replaying & Sorry for the mixup. I dont care if i am trading ECN or market maker as long as he execute my trades.

Until now I used MT4 & Trade station as framework to build, and test the algo that are being used for trading...
I am trading today with ALPARI UK & GAIN CAPITAL. (Mt4 brokers)

I am looking to upgrade my capabilities. (Also since I want to start to involve into other markets, not just fx)

I posted some Q in the forum with no success, maybe you can give me couple of cents... :-)

Regarding the broker/ platform who you recommend me on ?

Regarding the framework:

Things that I must have in the platform:

1. The ability to work with Real time Data.
2. The ability to use my Owen Data feed (since I am not working on a lot of different markets).
3. High performance regarding Back testing and using Tick Data.
4. The ability to program algo that is trading from the Order Book.
5. A platform that can store a lot of Tick Data in flexible way (not so important as the others).
6. a good interface that can allow me as a developer to get info from the chats in visual mode.

The platforms that have general info are ::

OpenQuant, MultiChats, TradersStudio, Right Edge, Trading BLOX

And also there are the intestinal platforms….but there are to many, and I don’t know if they are worth the money. ?!@

Thanks at advanced ... anyone ?

What size account are you thinking about trading with this system?