i got the 60cx a few months back with the topo australia map. was looking around for a while and the ones a bit cheaper and thort F@#k it i will just get a good one seam i will be hunting alone a bit this year.
i went to a GPS shop along St kilda road and the guy suggested this was the best one for me. its got topo lines, bush tracks floats, can handle water and so on. just remember you have to buy the maps aswell which are around 200 but you can get ones for different countries if you intend to travel, water ones, city ones and the normal.
i have used it driving around home it dose not speak but gives a little BEEP when you have to do sooe thing like turn.
i have only used it half a dozen times and have had no problems with it.