[10m] antenna question

[WA7DXZ at aol.com]

An antenna question re ten meters
 
I currently have a G5RV, which I use with a tuner, for  80-10.     (I also 
have better ten meter antennas)
 
Question is:   the G5RV is fed with 32 ft or so of  300 ohm  twin lead, 
then goes to coax... to a tuner.
 
Loads and works poorly on ten  and thirty meters.
 
Would I be better to use all twin lead,  ( a dipole fed with twin  lead, in 
effect)  into a tuner... for all band use?  Would I  notice any real 
difference? 
 
I assume it would load better on ten , and thirty meters,,, but,,, would my 
 signal actually be any different,,, or, would it hear any better than the  
G5RV?
 
Thanks... Bob in AZ