What would be more pertinent is giving more information on your situation. Do you have rigid placement requirements? What speakers are you looking at, or are you even in the market? Some speakers are perfectly happy up against a wall and some must have that extra space either behind or to the side in order to sound their best. If you're buying from an online vendor, odds are they'll be able to tell you what placement their speaker was designed for. If your'e buying local, then go there (to the store) and ask to demo the speakers and ask if you can move them into the positioning you want (ie as similar a position as you can to your rigid placement at home).
I guess to answer your question, buy the speakers that are already designed to work in the situation you have. Don't rely on room correction to figure things out. Audyssey and other room correction can help out a lot in terms of FR response, nulls, peaks, and other wonky effects a room may have, but not much save room treatments will help more than proper placement or buying speakers that will work in whatever placement you're going to use them in.
To use Salk as an example, they have several different models including the Songtower. Now the Songtower can be built with a front firing or a rear firing port. If you e-mailed Jim and explained whatever your placement restrictions he would be able to recommend the right speaker and port for you. Much like he offers some open back midrange speakers. Now if you're only placement options were crammed against the wall, he would steer you away from those speakers in favor of a sealed design or something of that nature.
To summarize, room correction can and will help a little, but is no substitute for matching the right speakers to your space/placement restrictions.