Aluminum wheels - Unsprung weight vs Stability

[edhchoe]

I see that people like the noticeable stability the added weight of the aluminum wheels provide. However, I also see that the punch out of turns is important in small tracks. If the wheels add enough weight to the car to be noticed it must slow the car down as well. Does the benefit of extra stability outweigh the loss of acceleration? I like the bling-factor but if it will slow the car down and make the batteries run out faster, then I probably won't use them...
I would like everyone's insight on this before I spend $$$ on the aluminum wheels to experiment myself. Thanks.