The LM75 really is inaccurate, I'd also go with the TMP102, though this one is missing in my own comparison (my blog)
The TMP102 is quite rare (and even more in Germany), if you are looking for a cheaper alternative, try a 1-wire DS18B20
, which is also very accurate, easy to connect (only 3 cables/1 data cable, 1 resistor and some more can be connected without using more pins on the pi) and kernel drivers are included in the current debian images or Adafruit images I believe. If it isn't availabe in a shop near you and time doesn't matter alot, you can order it in Asia on ebay (10 pieces < £10, 1 for about £2).
Furthermore there are still analog sensors that can be used with an ADC, but connecting them would be more complex and more expensive.