How many times must I link to this...? *yawn*
https://www.amazon.com/exec/obidos/tg/detail/-/B000004167/qid=1082408439/sr=1-13/ref=sr_1_13/103-5347196-9262249?v=glance&s=classicalThe orchestra is less than decent, but the pianist... my oh my. My personal favorite of each concerto, from the piano's standpoint. Orozco is just perfect, here. Read my review (the first one), I do my best to explain myself there.
(By the way, I don't seriously judge music on how hummable it is... I was just kidding 'round!)
And while we're on the subject of his concertos, Rach's 4th, to me, is undoubtedly the greatest work among the four. The way Rachmaninoff uses themes is simply indescriabable. This concerto represents a perfect union between piano and orchestra, so intertwined are the melodies and developements. Furthermore, he creates many themes and variations in the first two movements which feel unfinished, and they are perfectly concluded in the third movement.
You could almost call it counterpoint spread over time - first one voice begins, then a completely different one takes over, and so on and so forth over time, and the last movement seperately brings each melody to a conclusion... hell, it's a difficult piece to describe. Just listen to it more than once - I didn't think much of it myself until 10 or 15 listens; one night it just suddenly burst into meaning.