my89

Hi guys,
I'm not sure if this belong in the aftermarket product review section but I figure I'll start here. I know this question comes up everyone once in a while, but I have never seen any definitive answers (if there are even any):

So in this months issue of Popular Hot Rodding, they ran a special section on steering improvements. After the section on rack and pinion units, they covered steering boxes, stating that with new upgraded units you can get 90% of the improvement of a rack and pinion unit by incorporating a rack and pinion type spool gear. Not sure what that is. They listed several companies that sell new or rebuilt units, and I was wondering what you guys thought were the best options, especially if anyone has tried these units. In particular, does a rebuilt fast ratio box from a third gen compare well with a new unit? I believe mine is worn out and I plan on replacing it soonish. Here are the options PHR recommends and i put in others I know of:

http://www.detroitspeed.com/productp..._gear_prod.htm

$500, new, they say near rack and pinion performance. No one else says that, and DSE is an excellent company.

http://www.powersteering.com/

$225 for a rebuild on a 12.5:1 unit. I guess this the best performance you can get out of our boxes?

http://www.classicindustries.com/con...rchCatalogId=3

$550, why is this one so expensive? Thoughts?

And the two I know of:

http://www.flamingriver.com/index.cf...rod/prd330.htm

$600, like DSE a rack and pinion comparable device

And I know ARG makes a box but I cannot find a link for the correct application.