I got 30 before looking at the answers. Some pretty obscure prog rock/metal albums here.
[spoilerq:1]Here's the answer key, in order of apperance.[/spoilerq]
[spoilera:1]["acdc","dirtydeedsdonedirtcheap"],
["aerosmith","getagrip"],
["pinkfloyd","darksideofthemoon"],
["genesis","foxtrot"],
["ironmaiden","fearofthedark"],
["queen","newsoftheworld"],
["statusquo","makellysgreasyspoon"],
["supertramp","breakfastinamerica"],
["robintrower","backitup"],
["frankzappa","weaselsrippedmyflesh"],
["ledzeppelin","housesoftheholy"],
["zztop","eliminator"],
["kiss","creaturesofthenight"],
["alicecooper","welcometomynightmare"],
["saxon","crusader"],
["lynyrdskynyrd","streetsurvivors"],
["blacksabbath","paranoid"],
["marillion","marbles"],
["yes","theyesalbum"],
["cream","disraeligears"],
["gunsnroses","lies"],
["motorhead","nosleepatall"],
["thunder","robertjohnsonstombstone"],
["blueoystercult","agentsoffortune"],
["emersonlakeandpalmer","picturesatanexhibition"],
["davidbowie","aladdinsane"],
["defleppard","hysteria"],
["neilyoung","harvestmoon"],
["metallica","masterofpuppets"],
["rainbow","rising"],
["eagles","hotelcalifornia"],
["doors","lawoman"],
["badcompany","runwiththepack"],
["kingcrimson","inthecourtofthecrimsonking"],
["hawkwind","hallofthemountaingrill"],
["rush","flybynight"],
["judaspriest","britishsteel"],
["ufo","strangersinthenight"],
["rollingstones","letitbleed"],
["deeppurple","inrock"],
["jimihendrix","electricladyland"],
["vanhalen","1984"],
["thinlizzy","blackrose"],
["jethrotull","aqualung"],
["cult","sonictemple"],
["whitesnake","saintsandsinners"],
["blackcrowes","amorica"],
["who","tommy"],
["wishboneash","argus"],
["crosbystillsnashandyoung","dejavu"],
["u2","rattleandhum"],
["scorpions","blackout"],
["brucespringsteen","bornintheusa"],
["queensryche","tribe"][/spoilera]
Thanks Kev! #4 is my favourite.