Sorry, I've only just noticed the date of the original post. Have you tried Align? I've been taking VSL for about 6 months (you're right it's not cheap!) and have noticed a reduction in bloating and distention. It does nothing though if you don't adhere to your diet. I find that 2 sachets a day are required to make a difference. The recommendation is to take between 1-4 a day. (Although how anyone can afford to take 4 I'll never know!)
-------------------- IBS A. Managing my symptoms with the EFI/FODMAP diet and probiotics.