Which EP?

If I had to choose I would pick Horse Ranch first. I love my farms and animals from Cottage Living, and enjoy playing my sims living a self-sustaining life on a farm. Horse Ranch added even more to my gameplay as I love horses and the 2 packs are awesome together! I put the Cottage Living animals on my ranches and the horses on my farms. I use the B/B and CAS from both for farmers and ranchers, so I use these 2 packs alot! I bought For Rent as well as I have been wanting gameplay specifically for apartments as I have already built several, and it was difficult because sims saw the whole building as theirs, constantly helping themselves to other apartments! So I am happy to be able to keep them separate, plus now I can have apartments with families of up to 8 in each apartment rather than just the lot! It depends on how you want to play and what suits your gameplay the best. The worlds on both packs are beautiful!