I'm trying to find a precise mouse to use with a new MacBook Pro. My daughter just got the MBP for art school; she's a graphic design major. She has a small hand tremor from medication and it has been frustrating to use the touch pad alone. Many posts mention the Magic Mouse, MX or Performance MX, and VX but these all seem to be wireless. Any lag or delay in the wireless would be difficult with the tremor so I'm thinking maybe a USB connected mouse??!! Any suggestions would be appreciated-thanks!