I don't insist on combining the two, but I would like the scores for both, to learn in the long run. I really love the both (Rachmaninoff is my favorite composer, and his 2nd and 3rd concertos are two of my favorite works of his). I know that they aren't very original favorites, but pieces do not become as widely beloved as they are for nothing. For me, the 2nd has moments in all three movements that are exceptionally touching, with great dignity and beauty. The 3rd seems more agitated, expressing both rage and passion in a more dramatic fashion than the 2nd, which in certain moods is desirable, but other times I enjoy the more subtle feelings in the 2nd. That's what makes a piece a masterwork for me...it can be understood in many ways in many moods, and is truly memorable.