There are a good number
The biggest issue is usually Width, followed by Depth.
I don’t recommend CB without SSB or NRC as too much performance is lost.
That said, with a roof-center NMO permanent antenna (this system more important than choice of radio) even the least expensive AM-only NRC radio can perform adequately.
ANYTONE AT500 with NMO27 would meet low budget expectations. (President Harrison a higher quality choice). Short distance comms.
RadiOddity QT80 is “small”, and is full-featured. Nothing above it in price is a significant increase in abilities. True “high performance” (which matters).
An AM/FM/SSB mobile radio with adequate wattage to take advantage of that antenna or a taller NMO30 (640 whip). You’ll,
Hear, and Get Heard.
A top quality installation with eveything tucked neatly away is the radio that gets used.
This cannot be overstated for what matters.
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