You may wish to look at the RigExpert AA-55 Zoom. Several people I know find them good for a basic but accurate analyser.
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I have used a Sark-110 for years and find it excellent simply because of the wide range of facilities , user intuitive software, small size and long battery life. Goes up to 200MHz.
Another good accurate analyser is the FA-VA5 which can also run on the excellent DG8SAQ software when used in the shack with VNA accuracy. 600MHz.
Unfortunately both these are not in current production but you see them s/h.
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All the above are are single port analysers.
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The NanoVNA is a two port VNA, in my opinion unfortunately the software is very tortuous, takes a lot of getting used to and is rather clunky compared to the DG8SAQ VNWA and other analysers. It is the cheapest though, when bought new, has wide frequency range, is very accurate and has many fans so perhaps I am in the minority here.
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I guess it really depends what you want to do, but if it is only quick SWR measurements around 50 ohms and basic X measurements up to 500 ohms, also for measuring L and C and cable loss, then the old MFJ259b takes a lot of beating. Particularly with its analogue meters is the best way of adjusting an ATU rather than having to wait for sweeps.
John
