Will you buy the gun at a high end collector price, or well below that? What do you intend to do with the gun, store it in a safe in hopes it will appreciate, or hunt with it? If you plan on shooting it, does the gun fit you (stock dimensions) and is it the configuration (barrel length, chokes) that you want?
In my mind, these are the important considerations before purchase. Personally I could care less about a letter on any gun. If the gun looks right, fits well and I'm happy with the price, that's all that matters to me. But of course I'm more of a shooter than a collector/investor. Silvers