Hmm, a bit too much of a toy for my liking, also my eyes aren't up to squinting at a 2.8" 320x240 screen... Hook it to a 5" or greater screen and I might take a closer look, but I'd rather drop the cash on a HP/Tek etc, I just need to wade through the specs of all the different models...
On the Tektronix side of things I would try to get a 2782 or 2784 if possible. But I don't think they produced a lot of units. They are rather rare.
A little bit older there's the 2790 series. They were produced early 90s so they normally suffer from leaking surface mount electrolytic capacitors. They are easy to fix though and there's plenty of replacement parts. Some parts are also compatible with the older 490 series.
The 2750 series is the table top version of the 490 series.
The 2710 series was designed to be cheap and economic and only goes to 1.8GHz.
Then, older again there's the 490 series. Was popular early 80s. You need to check the options on those since almost everything was optional (preselector, GPIB, oven oscillator, integrated counter and so on.). The one to get would be the 494AP.
I would stop there and ignore all the older models from Tektronix.