Just an update to some of your prices, Buy.com has good deals on many of these models, for instance:
Tripplite ISOBAR6 DBS - $54.12
Panamax MAX 8 DBS+5 - $55.70
Belkin SurgeMaster Gold F9G933-10 - $33.14
MonsterPower HTS850 - $85.89
I'm sure some could be found even cheaper elsewhere...