I have a QRP Labs U3S 6-band kit arriving today, with filters for 160-10m. I plan on running a WSPR beacon with it for the majority of the time. It would be great if I could find a wideband antenna so I can have it automatically sequence through the various bands without changing antennas or messing with a tuner. It will be used to keep on eye on propagation, and not so much on antenna performance, so I really don't care if the antenna isn't super efficient - I just need something that gives me a good 50 ohm match, and performs at least slightly better than a dummy load. My first thought is something like the MFJ-1982LP. It gives a lowish SWR on all the major bands from 80m-10m. The other option would be something like a terminated end-fed or something? What do you all think? Preference goes towards the smallest, cheapest, and easiest option.

That end fed will work, similar to what I use every day on ssb and digital qrp and 100w.