The KJV is clear on these issues. I do not believe it can be improved upon.
...except, perhaps, the various revisions of the KJV from 1611 until the ones that are used today that were finished in either 1769 or 1850?
*EDIT: Compare the following Scripture verse mentioned by Greg between the various versions:
I Corinthians 6:9
"Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind," (KJV).
"Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived; neither fornicators, nor idolaters, nor adulterers, nor [a]effeminate, nor homosexuals," (NASB).
"Do you not know that the wicked will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral nor idolaters nor adulterers nor male prostitutes nor homosexual offenders" (NIV 1984).
"Or do you not know that wrongdoers will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral nor idolaters nor adulterers nor men who have sex with men[a]" (NIV)
[a]1 Corinthians 6:9 The words men who have sex with men translate two Greek words that refer to the passive and active participants in homosexual acts (NIV footnote).
Personally, I think that mentioning the word "homosexual" or the term "men who have sex with men" (along with the explanatory footnote) are clearer to most readers than the phrase "abusers of themselves with mankind" (as used in the KJV).