[Lowfer] Another Antenna question

[KU4XR]

Hello Fellow LOWfers:

I would appreciate any experienced input on some vertical antenna issues
for 1750 meters. " Using a vertical wire with top hat "; which would radiate
better; a shorter vertical with longer top hat, or longer vertical with 
shorter top hat ?? I would assume that the more wires you can include in 
the top hat, the better the RF will reach the top and radiate. Is this 
assumption correct or not ?? Has anyone tried hellically winding a section,
say 20 feet ( bottom , middle , top section ) so the overall heigth would be
a more one man manageable 30 feet ??. A realistic and do-able antenna for me
would be a 20 foot vertical with a 30 foot top hat which can include many wires
in different directions ( a capacitance issue only I'm sure ). 
Would ground losses be more evident with a top hat version, or the straight vertical ?
Any input will be valued and appreciated:

73, from Andy Bell - KU4XR - EM75xr