Well, we use the KJV in our church primarily because it seems to be the most accurate English translation...that being said....
Our Pastor-and most of our congregation agree that the original language supersedes the English translation; BUT since no one in our church speaks Greek or Hebrew as a first language that would be extremely difficult to TEACH anyone the Bible without first becoming fluent in Greek & Hebrew and then teaching the people Greek & Hebrew.
Now, does that mean we reject others that use 'other' bibles? NO. We do however teach from, supply and distribute the KJV as a standard and acceptable translation into Englich. Are there certain words that are better translated in other versions? Perhaps, but going back to the original text brings us closer to the true meaning of the word, verse or context. I have found that many other translations often use variations possible from the original text anyway; therefore the process is KJV while referencing the original text accompanied by commentary. Strong's numbers comes in handy.
We would not push someone out the door that brought in 'different bible' treating them as heretics-which I hear does happen. In my short experience, we have had people both switch from and to the KJV version due to better understanding. I personally have a parallel Bible with 4 different version and I find the NKJV and ASV most useful sometimes without having to dig into the Greek or Hebrew-sometimes the other translations help bring clarity to the original text as well. BUT-I always take it back to the KJV and the text has yet to fail me or be contrary or disproved compared to the original language.
Now there are certain translation that I would not recommend using like the NIV or NCV. Also, if you consider that some versions of other translations are literally 'changed' every year-that seems contrary to God's Word-since He is the same today as He was yesterday and will be. If the KJV was good enough for the revolutionary Church giants for 300 some years-it's good enough for me.
I spent much time 'wrangling over words' in the Bible version debate some nearly 8 years ago. One thing I did based on Biblical counsel was to 'settle it in my heart' long ago. I would happily stand by the KJV as the standard knowing what I know now. Does that mean people who use other versions are 'less saved' than I? Oh god be merciful to me a sinner....
I still recommend the KJV as a foundation standard-in English...