Kindle for Android and more

Just tried Amazon's free Kindle reading application for Android (from Android Market). Otherwise nice but screen of my Samsung Galaxy S II is too small for comfortable book reading experience. Tried also browser version "Cloud reader" and it was quite ok on laptop. Amazon Kindle reader device would surely be nice but I think it is a bit expensive as it can't be used to anything else (many may see this as a good thing as well). Maybe I should consider buying some (Android?) tablet for e-book reading and couch surfing.