I've read two books on lifting (I'm a newbie) and I still can't determine if pyramiding weights is the way to go or not.

Currently I am pyramiding all my lifting something like:

10 reps x 75lbs
8 reps x 80lbs
6 reps x 85lbs
4 reps x 90 lbs

I've read another book that indicated that 6-8 reps was more appropriate (same weight) for 2-3 sets instead of 4 sets.

Of course I realize that there may not be one best routine..I'm just asking for others' opinions.