the 60mm is my beloved one, it works very, very well an all my camaras (analog and digital). with the digital cam the focus distance is 90mm (because you have to multiply it with 1,5 - crop faktor in germany, don´t know what the name is in english!?). for flowers and somewhat else it´s perfect.
if you like to photography insects and such tiny things you should prefer a 105mm.
hm, but I use a nikon 60mm, don´t know what the canon one is like... but the 105mm from tamron ought to work very, well, too.