Some controversy exists over the SebArt Avanti S. It's a great flying model, but the landing gear is an issue. Basically, the stock gear does not work, if you want to retract the gear, you must roll the model inverted on takeoff or you can forget getting retracted. The D&L conversion to electric is a joke; lots of money and totally unreliable. Lots of reports online of these issues and despite a friend having the issue, I figured I could beat the odds by going with the more expensive XiCoy controller; I was wrong. It burnt out motors before my builder could even get it off the bench.

Last option was the Electron gear. That works really well but requires some tinkering to get it mounted and working, bad downside is that it's a $900 option.

It's a gorgeous model and very well built. I had the black/yellow/red scheme shown in the ad you linked. I also have a VT pipe installed and it flew great, very honest. Only thing I HAD to do was to remove the blue tint from the canopy and retint/spray the thing black. Made a WHOLE lot of difference in how well the model looked.

The Krill version was supposed to be an effort to offer composite wings that fit the existing model. As is common with Ivo Krill, he does not abide by agreements made in this regard. He modified the model so that his wings would not fit the older models, made a bit larger at 2.2 M so nothing interchanges. Both models fly very well, but the Krill is a chunk more money and has the same landing gear issues.

If you are wanting to go VT, you'll need a bigger engine, mine had a Behotec 180 and that worked pretty well, but something in the 200 range would be better especially if you want to do hovering.