Anything by Tool - latest album is Lateralus
Fantastic song of that album is the title track Lateralus
Tool Link
Anything by Rush - latest album is Vapor Trails
Awesome track of that album is Earthshine
Live albums really shine for Rush and all their instrumentals are top notch
Rush Link
Anything by King Crimson
Another band (like Tool and Rush) that are even better live
Instrumentals are amazing
King Crimson Link
Outside of the hard rock genre check out the stuff by BT
Especially the remix of Flaming June
BT Link