I need educated opinions

What would give over-all better sound, LV12F x 2 or LVX12 x 1?

Also, I'm still trying to get the finer point of the sealed vs. vented down. What are the advantages and disadvantages of each? Generally, I'm still trying to decide if overall, I'm better saving and getting the most expensive option, or having a pair of less expensive ones.

Right now, this will be music only, however, I want to slowly piece together a home theater system, so, they will eventually be used for both.

Ultimate room size they will be in is sort of unknown. We are house shopping. Currently, they would be in a 11 x 15 ft room living room that is open to and has a shared wall with a narrow 9 x 15 ft dining room, both have 8 ft ceilings. The houses were are looking at are likely to have different layouts and sized rooms. But guess would be these will be in rectangular family room 12 x 20. Similar ceiling height.