Bassman,
"Better" is a VERY relative term, particularly in the realm of power conditioning.
Your Panamax unit is quite likely everything you (or I for that matter!
) need for surge protection.
It just depends on what you want. If the extra cash is worth it to you for the fancy display in a rack mount unit with good cable management...then you pay for it.
The Belkin PF60, my APC H10 and the Panamax strip you own are all solid and do well what they are designed to do....protect your valuable equipment from regularly occuring power flucutations that can cause damage.
As for the rest, it often adds up to bells, whistles, looks and a wee bit of snake oil!