I'd say start off with an e-Spyder and eventually work your way up. If you want to save money and know definitely that you're going to get the fastest loader and most efficient air system, then invest in it. Money doesn't seem to much of an issue for you but buying these items instead of getting a gravity hopper and a CO2 tank would just save you the trouble.
I did suggest that you begin with a lower-end gun so you can get the gist of how paintball guns work. Although it'd be nice to start with the DM4, the ease of the Spyder will just let you realize the more important part of paintballing: fun.
The DM4 requires a little more technical savvy to strip and put together while the Spyder is a piece of cake.
