Vnc Client for Ubuntu??

Hi I have recently bought a window vps that needs a vnc client in order to login into and I have been have the hardest time finding a good vnc client for Ubuntu I have tried remmina, but I have absolutely no control over the mouse its like an extend mouse and it is very hard to use....I have tried vncviewer, but ubuntu has control+alt+delete as the keyboard shortcut to turn off the computer and I have tried to disable this many time and whatever I do just seems not work if anybody has any ideas or know of a good vnc client that will work on Ubuntu please let me know thank your for taking the time to read this and help me out.....