We have some good old classics from lecroy here, Waverunner LT series.
200Mhz/200MSa/s, 500Mhz/1GSa/s, 350Mhz/1GSa/s...And they all did their job.
First I was expressed from the 8GSa/s the rigol mso 5k offers ( and to be honest, this value is still a groundbreaker in it´s class and beyond, noticed on the paper).
But very soon I´ll take notice that in practice you won´t loose a thing having this or "only" 2GSa/s.
So as always I go along with tv84 when he say, if you can spend max. 1000 bucks get the rigol 5000, if you can spend 400 bucks more, go for the siglent 2k+.
Mic drop...