I picked this up from
http://www.powersystemsdirect.com/30/183.htm?710 Given the differences, is it worth spending the extra $'s for 5300?
Here is a list of differences between the 5300 and the 5100:
The Max5300 has 11 outlets vs 10, including a front convenience outlet. The 5300 provides protection for 2 satellite and 2 coax lines, vs 1 and 1. This unit has double balanced L filtration circuits vs balanced L circuits. This unit has a analog voltmeter vs a led version. This unit has a DC output trigger. Finally, this unit has a detachable power cord.