Thanks for your thoughts @FranticsmurfIt was the clarity of sound from the Elf combo that drew my attention. There were several customers in the shop at the time, including someone else, shredding away on electric six string, plus some music being piped through a PA system. The member of staff was actually just using the amp to quickly test a couple of items. As I say, its' volume and clarity drew my attention (that, and the fact I'd got the cab, but not had a chance to play around with the combo).
Usually, when you plug into an amp in a music shop, you get all sorts of noise and low-end frequencies bouncing around - but the combo was really clear and punchy. The first bass I heard through it was a 5 string, and that low B sounded superb. I the guy then handed me a Jazz bass to plug into the amp, and it also sounded incredible. Other BC members and a few on YouTube have said how great the combo is when combined with a 1x10 extension cab.
I must say, I was also tempted to ask to try the 2x8 Elf cab too - but that may have left me wanting yet another cab
EDIT: Has anyone else on here got the 1x10 combo plus a 1x10 cab... or even a 2x8 Elf cab? I'd really like to hear your thoughts about how well the amp copes at a gig or one of those very loud rehearsals