I have an APC H15 Power Conditioner and just bought an iMac 27'' and want to protect it against power failures. I was wondering if I could connect the power conditioner to the wall outlet and then a UPS on the conditioner. The iMac would be connected to the battery backup outlet in the UPS. Also, IF this can be done, in which outlet should I connect the UPS on the APC H15; Digital Filter or High Current filter? Thanks in advance! Edit: Recommendations of UPS devices are welcomed!