Something else to think about, red dots are generally quite compact, compared to scopes. I have a bushnell 2*32 pistol scope on my HW45. I chose for a scope cos that way I don't have to worry about batteries. My only gripe is that the scope is nearly as long as the pistol and that makes the loading and cocking a bit more awkward. On the HW45, like on the HW40 it helps if you can get a good grip around the back end of the top of the action (the bit that levers up). A red dot could be confined to the fore end of the frame.
On the balance I would say the trade off is worth it since it really has improved my accuracy compared to the dot sight I had before. I am also glad I did not go for an even higher mag which would make the wobble more annoying (I'm a crap pistol shot but slowly getting better)
Rob
FWB 65/100/P8X, Diana LP6/8/10, Weihrauch HW30/45/40, Tau-7, S&W79G, Hammerli Master, FAS604, Skan Mini M32, SLR98, TX200HC