Why did some Federalists oppose the Louisiana Purchase?

The Federalists opposed the Louisiana Purchase because they better favored close relations with Britain, and not with France, under Napoleon, believing the treaty to be unconstitutional, and more likely spending tons of money to use it as a opportunity to attack Spain if it successfully purchased Louisiana. They feared the rising power from the West, threatened by the new citizens there, so rejected the proposal, fearing political power from the Atlantic seaboard states within the perimeter. Of course, some of them hate Jefferson, who is a non-Federalist so is just pure dislike of the other political group.