I am using Vita for about 10 years now and never had any problems,this past summer i got their new furnace and i am more than impressed . My wife love the stainless steel finish ( she believe is an appliance
) but i love the cool touch pad with lots of functions , fast cooling ,auto temperature calibration at every bake ,you can save in its memory each case you baked but the most important thing is that it never let me down and never had any problems with underbaking or overbaking a case .
I heard the Zubler is a god quality furnace also Ivoclar i know is a great furnace .
The bottom line i think that what you pay is what you get ,i am not saying that a whip mix will not get the job done but when you think that the difference between a whipmix and a top of the line furnace is just about 30 -50 crowns that you sell ,you do the math.
God luck in your search and all the best