I think we are missing the point. If it bothers the conscience it is sin, even if it is not actually sinful. Because you cannot have faith if you think you are sinning. So even good things are sin if not done in faith.
The "conscience" is as fallen as the will.
Such decisions as to the Scriptures and as to all matters of faith and practice are not up to personal expressions or opinions, but are principles placed in Scriptures.
For example, this business of the Scriptures is not unrelated to the same line of thinking when it comes to intoxicants. Again, not to derail the thread, but to state that a principle is involved.
The high priests, while serving, were not to take any intoxicants. Are not the believers of a higher calling than even those who brought sacrifice before the God of Heaven?
So, too it is with the Scriptures. They (as were the lambs) should be examined for consistent purity, for righteousness in presentation, and for the lack of stain from abuse of sin.
The principles of the Scriptures are what drive the believer, not the conscience.
Another example is stewardship. The principle of stewardship would require to use the funds entrusted to me wisely and according to the advancement/support of the work of Christ, that the believer is to be a living sacrifice in not squandering what God has blessed them to be sustained. That would include such items as food, clothing, shelter, ... The principle would also exclude such things that are worldly such as the Hollywood movie houses, the dance halls, the professional athletic events... in which the funds go to support what is anti-christ both message and attributes.
There are other examples, were the believer must take the statements of Scriptures and present a principled life in choices.
That same principle applies to selecting a Bible, not from that which is convenient, easy, likable, or even that which is appealing as far as size. But that which is the most faithful as can be presented to the manuscripts.
That excludes none, but tempers the choosing from preference to what is best for that believer.
To the child, the NIV may be better than the NASB or the KJB.
I personally have a problem with the ESV in comparison to some others, but that may mean I have not grown in the Lord to the point of discerning the credibility some place in it.