Sergeant's 'Gold' : Okay for our cat?

PJ has been scratching lately, but I didn't know what brand of flea
treatment to get him. On the grocery run to Wal-Mart today, I found they
had 3 brands; Sergeant's (regular and 'gold' varieties), Hartz
(nightmare stories there), and another ("Nexxum" or something, about
$7.00 ).

Is the Sergeant's Gold okay, or should I hunt around for Fronline or
Advantage?

Here's what Sergeant's has

Etofenprox...........................55.00%
Pyriproxyfen...........................2.20%
INERT INGREDIENTS......42.80%

Anything frightening there? I remember that it was pyrethrins that made
Hartz so dangerous and that they refused to recognize the problem.

Any help you can offer, thanks alot.

JM