If you live in a town or city, consider that over 90% of your night driving is going to be with the low beams. There just isn't much opportunity any more to run the high beams in an urban environment without blinding oncoming drivers.
The biggest problem with flush-mounts using DOT sealed beams is that they put a lot less light on the road than even the Fiero's wimpy OEM sealed beams, and the low beam pattern is poor. In contrast, the Hella 90mm halogen (H9) projector low beams put more than 2 1/2 times as much light on the road as the stock headlights, and the pattern of light is vastly superior.
If you are concerned about low cost and lighting performance rather than bling, the Hella
H79567 is an exact (plug & play) replacement for the stock Fiero rectangular sealed beams. They will cost you about $85 a pair, including the H4 halogen high/low beam bulbs ... a very good value. They're what I have installed on my Formula right now. Here is a photo of this headlight's low beam pattern:
Note that these are ECE (European) spec headlights, which means that they are not DOT compliant. Hella does offer a similar model that is DOT compliant, but I don't think the lighting it provides is quite as good. The ECE version is legal in Canada, but not in the U.S.; however it is unlikely that anybody will ever notice the slight difference.
[This message has been edited by Marvin McInnis (edited 04-23-2007).]