IF your interested in VERY high end Baan Sabai is approx 1k per week USD but is probably one of the most high end villas on the island..
Check out the Sunset residence in Kalim.. approx 30k monthly rate luxury 2 bed apartments with shared pool.. nice standard..
Phuket Beverly hills has apartments and townhouses with shared pool for 25 - 35k but mostly like to rent long term..
PR011 on this site
http://www.villa.co.th/galleryx.php?id_index=3# is ok but IMHO a bit over priced for Kamala and shared pool...
Patong hill estate should be about 80k or so if they have any available.. Nice location and very secluded.. I nearly took one of these long term last month...
http://www.phuketland.com/villa_for_rent/
http://www.nakawanna.com/
I know a serious luxury place up in the baan nam yen development and the owner might come down to 100k for the month.. normally he takes a fair bit more for short term rates but if you dont need a maid etc and have a whole month he might move.. I will see if I can find some contact details..