densitrometical analysis

[sabine Hanelt]

Hi netters,
we are making nothern blots for enzyme activitiy and especially induced enzyme 
activity. To analyze the blots we scann them and evaluate them by 
densitometry. We don't have a program for doing this, so we have to go to 
other groups to to our analysis.
Now we are planing to buy a programm for denstometric analysis and my question 
now is which program is the best and the less expensive?
Hope that you can help me.
Thank's in advance
Sabine