I am getting new PSU, very soon...... My top 2 choices are: PC Cooling and Power 750w for $149 up front, $119 after rebate, but not modular.... http://www.newegg.com/Product/Prod [...] 6817703009 OR Corsair 620w modular HX series for $145 upfront and $119 after rebate.... http://www.directron.com/cmpsu620hx.html
Its personal choice really they are both excellent PSU's, i would get the PCP&C
Depends on how confident you are on your cable management skills. As chook said, both are excellent units, you just need to decide if you need the modular cables or not.