I tried the Bogner Shiva and it lacked the gain and aggressiveness thats on Van halen 1(first album),Ive been using the VHT/Fryette Deliverance D60H head(great amp) and it achieves the Van halen 1 sound almost spot on,im also using a older VHT 4x12 cab loaded with celestion 25 watt greenback speakers.VHT/fryette Deliverance amp is just amazing for THAT sound.I changed out the KT88 tubes for 6550 tubes and it worked out very well.