I'm looking for a reliable program that I can use to backtest my strategies with multiple pairs. I'm totally frustrated to MT4's tester and at this point I'm willing to learn a new programming language (it's not a big thing for me) to test my strategies with some decent tester that can handle all the portfolio - in this case all the currency pairs available at my broker or some subsection of them.

So my question is: what is the tester you would recommend? I have been thinking about wealth lab, does anyone have any comments about that? Trading blox also has a platform but I don't know anything about it (except that trading blox is operated by a very bright ex-turtle guy). Does anyone have any other recommendations? Ninja trader? Tradestation?