
Some folks here have offered their kind advice, like "start of smaller". If you've never done a solo electronic act before, I would think hard about heeding this advice. Otherwise you will be overwhelmed and it will not be a fun experience. I know a lot of guys who were highly skilled musicians who delved into this stuff only to find out that getting up to speed was frustrating and made their heads hurt.
Each one of the devices you've listed will take some time to be adept at using them - especially LIVE in front of an audience. But I also understand you want to have room to grow, so I'd be tempted to start out with the Electribe, KP3 and midi keyboard. You can easily throw down some wicked jams even with that setup.