I have a similar predicament. I'm currently running a 508.24 with VT100 MkIII and LS16 MkII and wondering about the G08. I've heard the G08 in another system (solid state), and liked it very much. Based on that audition, I suspect that the G08 would definitely be a step up in terms of soundstage and presence - I remember it being very involving and having a very airy, open sound, much more so than the G06 which I compared it with. I guess that the 508.24 is somewhere between the G06 and G08 in quality.
One thing I am finding with my current system is that I'm only getting the best out of it with well-produced recordings, of which there are fewer than you might think -in which case that may be the limiting factor, even with the G08.
One thing I am finding with my current system is that I'm only getting the best out of it with well-produced recordings, of which there are fewer than you might think -in which case that may be the limiting factor, even with the G08.