Another very good option for a RTSA that won't cost you an arm, leg, or kidneys is the Signal Hound SM200A. 20 GHz analysis bandwidth, 160 MHz (!) RTBW, and overall better noise figure compared to the Rigol. Price is similar to Rigol's offering, but as far as I can see, it doesn't have built in TG.
But for me the disadvantage with the SM200A is that it isn't represented in Turkey, so it will get more expensive with all the import procedures, duties etc. I'm looking into getting either the RSA5000 or the SM200A soon.