I've answered this before, but I recently reconsidered the Wealthlab vs. Tradestation debate. And I still recommend Tradestation.
With Tradestation, you get stock, option, futures, and forex data included in the subscription price (plus real-time fees). With Wealthlab, you have to purchase the platform (it's relatively inexpensive at $650), but your data will cost a ton unless you only trade stocks. I trade futures, stocks, and forex, and my data from Esignal would cost more than my Tradestation subscription, which includes forex for free.
The Wealthscript language is tough to learn unless you feel confortable with traditional programming languages. Your EL scripts are NOT easily transferred unless you have a programming background.
The support for Wealthlab is very good, but the Tradestation community is pretty good, too.
If you only trade stocks, give Wealthlab a trial. If you trade other markets, go with Tradestation.
P.S. I don't use their brokerage; this is just my opinion of these two platforms. For the record, I use IB as my broker.