I agree 100%. I would rather spend the additional required for a high quality down bag, than purchase a cheaper one that will need replacing in a few short years.

That being said, I have three bags. Two high quality bags; a +20 and a zero degree bag, my third is a really inexpensive and light +40 degree bag that I use for the height of summer when my +20 is just too warm.

Honestly, when my two bags need replacing I will gladly shell out the same kind of money again. A good quality down bag is the best backpacking purchase one can make IMHO.