from what I heard the TP maps have a good reputation, and an extremely good price. So good choice! I was lucky enough to find an OS stage 2 tune that worked with my car so I didn't need to pick up a new tune, but once I add a couple more goodies I'm certainly going this route. I know I'm not getting the most out of my tune but it's safe for the moment so that's all I care about.
I used cobbs ATR before so going to ECUflash was pretty easy, though they have a lot more parameters then I know how to read so I'll leave that for the professionals.
I bet you'll be going to a stage 2 in no time, the possibility of power is overwhelming!