If you don't need or want the burst modes and full HD video, you'd probably like the FZ35 as much as the FZ40,.....maybe more since it's somewhat lighter.
From what I've learned, the FZ40 has only the following upgrades:
3" screen vs 2.8
24X vs 18X
Slightly wider lens
I love my FZ35 and would not upgrade to the FZ40, but I will to the FZ100 since I want the new speed features.