a few reasons to get prosumer over DSLR would be the lens.

not everyone is into changing lens. the kit lens of a DSLR wouldn't be able to take macro shots as well as a prosumer.

my Fuji S7000 can take better macro shots than my 350D on kit lens. simply because the kit lens was not made for macro shots (that's why they have lens for macros).

when comes to zooming, heck my S7000 zooms further than my 350D kit lens as well. haha. so yeah it's all rounder with that lens.

also another thing about prosumer, is that instead of using the viewfinder you can use the LCD to aim your shots. some people just love that, DSLR you don't have that unless you buy that Olympus DSLR.

some prosumers like those from panasonic and fuji (not sure about the Canon S3IS) comes with manual-focus lens ring. cool feature but i find it drains battery like silly due to it's motorized nature. and usually the prosumer will come with a lot of settings not found on P&S but P&S seem to be offering more feature than before. the game is some what closing IMO.

so yeah - that's my take, that's why i'm not selling my prosumer yet because it does have it's flexibility and functions.

even the Canon G7 is a good camera despite it's price being that of a DSLR.

IMO most important is to know what you want and what the camera can do for you.

May I know how much for a Canon S3 IS now?

err... ther'es no 22-200mm (as far as i know)

if u're talking about 18-200, i read it was RM2800 give and take 200 bucks
if ui're talking about 55-200, i read it was RM850 give and take 100 bucks.

RM1400 from LYP. Last week.