The amount is controversy for diversity after removal is the amount pled in the complaint unless it seeks non-monetary relief, the state court does not allow the inclusion of a dollar amount, or the state allows recovery beyond what is demanded in the complaint. 28 U.S.C. § 1446(c).
Venue is automatic for the district court sitting in the locale of the state court action. 28 U.S.C. § 1441(f). But any party can file a motion to transfer the venue of the case to another district court. 28 U.S.C. § 1404.