I got myself a vertical mouse and no longer grind down my wrist on the table. Definitely worth every penny.
I used to have the Microsoft Explorer mouse which is a bit larger, I used it for over 5 years per mouse. The old version is no longer available and the new one looked terrible, that got me into looking for alternatives in the first place.
But if you’re okay with the default mouse sizes and don’t have other issues they are fine too.
You can use a git client to connect to SVN repo, which is really neat if you have to deal with a SVN repo. Therefore I would assume git has no issues with migrating the history from SVN.