t/max

You mention the word reliable.
The number one way to maintain reliability, as far as the efi goes, is not to change or add hardware items. The stock system has proven (almost) bullet proof, whereas others have not.
The best case scenario for an aftermarket "hardware" item, is to be as reliable as the stock system.
This is where software based solutions rule, as they need no hardware changes.
If you are going to go with a stock HD combo, and are not looking to become overly involved in the tuning process, then the HD tuner does have some very good canned maps.
If you are like many, and are thinking of a little more personalised approach to your performance add-ons, then the Master Tune from TTS delivers the broadest access to the stock ecm.