Yngvai X
Dark Emperor
Symphony of Dreams, SymX *have* participated in some high profile tours since The Odyssey came out, the biggest two being with Blind Guardian and Stratovarius. When I saw them in NYC with Blind Guardian there were well over 1000 people there (I won't call out a number bigger than that since I don't remember how much The World held) and the place was sold out. The Blind Guardian and Strato tours exposed them to the right audience they needed to get a hold of in both the States and Europe (respectively), and I've talked to many metalheads that only know of SymX *because* of seeing them opening for these two bands.