Id do the Sundowns since you have 1500 rms to play with.
Im about to do a new setup and im considering 4 AT Strato 10"s at this moment. Nice little cheap subs.
2010 Focus SE coupe 5 speed
Pioneer 80prs/AQ2200D/BK800.4/6 SQ pro mids/4 SQ supertweets/AlphaDamp/Projector retrofit/LED tails/ Walled with 2 DC 18"s
A lot of mods.