Dragun FYI
so you are aware... the Black Dragun, while basically a Spyder clone, will not take an electronic frame made for a Spyder (like Storm). The bolt holes aren't spaced the same, though you can elongate the front one and make it fit. If you get the Dragun this would be one upgrade I would consider.
The Spyder Imagine/Esprit are decent starter markers with a very nice trigger in place (IPI - Intelligent Pushbutton Indicator). Nice feel, adjustable, single pushbutton actuation, tourney semi-only lockout. Quite nice.
I have no direct experience with the Excelerator line other than observing/talking to owners. Nothing of note. I haven't seen anyone throwing them on the ground out of frustration anyway!