I picked up an Aria SWB Lite from a BC'er for £450 and not looked back. Not under any illusion that it will ever sound like an acoustic DB but with Spiro solos, Phil Jones rig, decent preamp, it sounds great in the context of the acoustic material I play in a couple of folksy/country/bluesy bands.
I'm primarily a BG player and like you, couldn't conceive of dragging an acoustic DB to gigs along with all the other gear, as well as finding house space!
I can't imagine that the Aria sounds hugely better than a well sorted Stagg, and got to say that I was sorely tempted by a rosewood fingerboard Stagg, but I decided to go for what I think is a better instrument all round. A good S/h Aria would be within your budget.
If it's any help, I'm not yet gassing for Eminence or Silentbass etc, after 6 months of ownership though I guess it's early days!