any suggestions?

OK, i've got the amp, got the guitar, got the lead and got the plug socket, all i need to save up for is an effects box/processor thing. I'm looking for something with great delayed reverb, good 'metallica/black sabbath' type crunches and a midi socket. any suggestions?
p.s Also, anyone got any info on a 1980's fernandes revolver e.g how much would it be in shops