I have two QRP rigs: the Elecraft KX3 and KX2. My favorite is the KX2. It's so small, light and portable with internal Li-ion batteries, and an internal mic. The built in ATU is unbeatable and it's really fun to use this thing like an HF HT on the upper bands. There's even a guy that made a USBC charger and replacement side plate for it, which is on my "must have" list.