Try surfing the net, it�s like using an encyclopedia index, and..... it�s much more fun.�OK� And adds another neutral fact/opinion to your statement.
�
Try surfing the net, it�s like using an encyclopedia index, but..... it�s much more fun.�OK But offers a contrast to the suggestion, comparing using the index to using the internet.
�
The combination of "and but" would not work.�
Edit
I just saw Bruce�s and the other answers, below this one.��