I would think the minidsp would be even more help with 1. Either way, if you use a minidsp to get a nice curve, why run you sub through Audyssey? You'd be better served telling your receiver that you're not running a sub, then turn it back on when it's done.
HT: Denon 3808ci | NAD T763 L/C/R | Klipsch KLF 20s | Klipsch KLF C7 | Klipsch KLF 10s | Klipsch KG 1.2s | 24" THT | Bash 300S | Panamax 5300PM | Panasonic 55VT60 | Oppo 103 | PS4 | X1
Family: Pioneer SP-SB23W | Pioneer Elite Pro 111 | PS3
2 Channel: Yamaha R8 | Cambridge Audio D500SE | Klipsch Heresy HBR