If you can get access to a drumkit once in a while, i would just get a pad to do some rudiments on, because although it wont be as fun as a drumkit, if you cant play a drum how can you play a kit? , they are great to practice paradiddles and other rudiments. They really help when your learning fills, you get a better feel for timing during them. Also, i would not get an electronic kit, because as other people have said, they are not very quiet, i would instead get a drumkit with mesh heads on them, ive never done that, but ive head its a good silent practice method.