1. Really depends on what you want. Decavol in the PAK is more of a hardening agent, whereas 1AD in the HRK is more for mass... so if you are wanting to do an all out bulk, I'd stick with the HRK.
2. You should be OK with the PCT of Arom-X. If you ran the HRK longer than 4 weeks, then a SERM on hand would be recommended.
3. This is just my opinion, but I'd bump my calories up a bit on weeks 1-4 even though you are wanting to recomp a bit, I'd still prefer my body be primed for maximum growth. Maybe not go to the caloric numbers of what you are going to run during weeks 5-8, but I would start ramping up towards that before hand. Maybe go 3000-3500 during the first 4 weeks.