which head unit need help !

[versa071979]

cant decide on which head unit to go with . For know I am only replacing the head unit in my 07 versa s hatch then later will be replacing the stock speakers then run an amp and a small sub in the trunk these are the 2 units I am looking at the first unit is http://www.crutchfield.com/p_130X700BT/ ... ml?tp=5684 I already have this unit installed in my wife's car and I like it the Bluetooth works great the second unit is this one http://www.crutchfield.com/p_158WXGT90B ... ml?tp=5684 my mane concern is the pioneer is 14 watts rms and the sony is 17 watts rms will there be a big difference between the two I like the sony because it also has the Bluetooth and has Sirius radio built in