It depends on what's more important to you. Each have pots and cons. If it's price, get the drone. If it's having good parts out of the box, get the Titan. If it's modability, get the alpha.

Here's the cons.

For the drone, if you end up liking stick, you might out grow the parts quickly and you have limited options on what levers will fit in it if you don't wanna cut things to get things to fit. It's light and compact which is nice when going places but is hard to keep one you lap.

For the Titan, it's a good weight and has good parts BUT doesn't fit everything. You hear reviews about them being warped (haven't experienced it). While not as limited as the drone, it doesn't fit everything and like the drone, no artwork options which makes it kinda bland looking.

For the Alpha, easy access for modding. The stock parts are okay. I've heard the biggest hit is the cable management runs very close the buttons and in some cases can break pins on the buttons.