In Reply to: Sanur - 2 families for 2 weeks posted by Vanhove on Tuesday, 30. August 2011 at 13:12 Bali Time:
for a 4 bedroom villa with pool & close to the beach
Not sure about a 4 bedroom beach villa for that price
There are quite a few 3 bedroom which probably fall within your budget but with 10 people they would perhaps be too small.
There are some options at the link below (not sure if anything may suit though)
Perhaps Villa's Pemandangan Laut or look at 2 separate villas on the same property/complex
And some from flipkey
http://www.flipkey.com/vacation+rentals/indonesia/bali/sanur/
Also if you type in '4 bedroom villa sanur' in google a few come up