Compact don't work like DSLRs.
There is very little chance u will get anything "noiseless" even on the priciest compacts (Canon's G9, Panasonic's LX3).
For compacts, you should not b looking for great ISO performance, as most of them perform nearly the same.
What u should look for in a compact is size and ease of use (iA mode is a breeze to use, u can virtually shoot blind-folded); and of course, the color reproduction of the cam.

The best way for u to decide is to try the cams out at the shop.
Don't b shy, it's ur right to try and choose