I just cant decide on a PSU. I have an antec 1200 and have been looking at Antec CP 1000W Modular Power Supply and for £100 that sounds great. I have also been looking at zalman, akasa and corsair and i just cant decide! Please help me decide 

If you listed your current PC's specs and what you are planning for future upgrades, the rest of us would have a better idea of what wattage PSU to recommend. (apologies if I sound patronising)
The PSU in the link below at the price it is right now is what I'd buy for 90% of new PC's that's out there right now (Except for probably a Core i7 970 or 980x with 480Sli graphics)
http://www.overclockers.co.uk/showproduct.php?prodid=CA-008-CS