I think that you need to answer that question for yourself.? If you go back and read some of the threads in this group for Spurs and Harmonics, you will see that there are a number of modifications that you would need to make to bring the version 3 (v3) into FCC compliance.? So if you like to modify things, the v3 will give you a lot of opportunities beyond adding things.? You may also be equipment challenged to verify if you have tamed the spurs, any second receiver with some measurement system should be able to help with the harmonics, or just use SSB and not CW.
There are also comments about key clicks and audio issues with the v3 on this group.
If you want to learn allot and jump into kit modding, get the v3.? If you want to build a fairly compliant semi kit and add improvements of functionality (touch screen, AGC, S meter, ect..), buy the new v5.? Your choice.
FWIW
73
Evan
AC9TU
