"CRUISE" lines

HAHA.

Finally I did a 30 minutes check on the Internet and looks like there are two CRUISE lines sailing between Stockholm and Helsinki:

Viking
Silja

Looks like Silja is newer, but that doesn't mean it's better... I guess.

Here's a brief plan:
3/24 Leaving Seattle
3/25 Arrive Stockholm
3/26 Leave for Finnland
3/27 Overnight at Tallinn
3/28 Back to Stockholm
3/29 Back to Seattle

But then... that means I have close to one day staying in Stockholm...

Hum... what should I do le?