Hi,
I wanted to buy DSA-815, instead I've got SignalHound SA44, played with it for some time and replaced it with SignalHound BB60C, and I quite happy with it. BB60C has the same price as DSA1030A, and it has much better performance.
BB60C has some drawbacks -
gentle input SMA port (center pin is very tiny and soldered very gently to thin trace on a board, I've repaired it once),
and a bit limited power range (+20dBm max, you should take care not to blow the input). In all other things it is much better than Rigol.
Shahrir has a video about BB60C, so you can compare both reviews.