Misfit, the Samsung SyncMaster 204B is a good choice in the 300ish dollar range, very good 5ms response time and great 800:1 contrast ratio.
The Dell 20.1 incher is also nice and you may be able to get it cheaper with their Coupons/Deals they run all the time. HTH
edit: Go check the Sammy out at Bestbuy or some other big box store, that way you'll be sure its not too big, or any other 20.1 inch 4:3 ratio LCD.
edit 2: LOL, sorry bout that just saw you are in Finland, do not know if Dell does buisiness there, but you should be able to get the Sammy there for sure.