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I replaced mine and noticed no difference in feel. I guess it just has the added safety of not cracking leading to leaks.

Is your clutch heavy duty or stock though?

Whats wrong with a standard line?  They are reinforced with a thin metal braid as standard and unless you have some unholy amount of force on the clutch *cough*alex*cough* then there is no reason to change it.  After all, its not actually that long.
 
Try bleeding the sh*t out of your clutch as is, replacing the fluid, like I did to mine at your place a while back.  Short of replacing the clutch itself, thats about as good as it will get with regards to feel.

I agree with Mandalay on this one. I had a new rubber line made of better material for $20, only as my line was really old and showed disvolouration at the bend (balooning etc)

ED - nothing wrong with the standard line but like it's been said after 20+ years they've deteriorated. Clutch was bled a while back with ZMIT and it didn't really make any difference other than the warm fuzzy feeling that there is new fluid in there. For < 60 bucks, I'm willing to find out :P

A Genuine Toyota rubber line is fine and most are still fine even after 20+ years
 
On paper, a teflon line with stainless braid is a better choice, however like everything depends on the quality and how its made, it might not be better if its poorly made teflon hose with poor fittings compared to a Genuine Toyota rubber item.
 
It would be interesting to see a stainless steel braid smooth bore teflon hose used for brakes or clutch after 20 years, the teflon itself wont break down over the years due to break fluid, or pretty much any fluids i guess
 
 

I've got a Execedy Clutch. Certainly not light.