If you are in Germany and/or enjoy travelling, largest show of spring is perhaps
http://www.highendsociety.de/english/he_e.html . After attending about 100 shows over the past decade, the High End Society Show in Germany is the one i feel offers the greatest interest. Have discovered many great things that would have been missed had i stayed Stateside. The vast variety of equipment from all around the world is staggering and everyone from small niche to many of the majors show in Germany.
Also makes for a great excuse to go overseas and enjoy the autobahn and the Nurburgring Nordschleife
http://www.nuerburgring.de/1_nuerburgring/touristenfahrten/index.html?L=1
