CQG's Dom Ladder are very good, you have two option to choose from, "Dynamic" and "Responsive".........I personally think they are better than T.T and Stella, to which Ive both used in the past.
Check out CQG's new product "QTrader"...$40 p/m....the same Trade Execution as their Integrated Client but at a much cheaper price. I.C is around £300 - £500 p/m.
Ive started using it, it has around 6 Trading Interfaces inc Dom Ladders, Spreadsheet Trading and also Trading from the Chart.
Heres the link:
http://www.cqg.com/Support/Free-Trial/QTrader.aspx