Here's the thing: I know I have to do all the math with commissions and whatnot, in order to have the best ROI possible. But what happens when I move on from ETF's, and want to invest on products that this particular discount broker does not work with? Is the process of moving stuff from one account to another easy? What's the best move here? I know this should probably be last on my list of concerns right now, but think long term, right?