Nothing wrong with using a dipole even at 30 ft. which is about average for most hams.You will make plenty of contacts without need of an amp so it should not even be a consideration as to type of antenna you erect.
I am using such an antenna. Homebrewed it myself. More or less a G5RV type of antenna. Got 5BDXCC with it and 100 watts. Worked 285 countries on it so far.
73 John AF5CC