Like a lot of people in this thread, I would like to say that a high-end 1911 would be my someday gun. However, I realistically wouldn't pay upwards of $1500+ for a gun unless I became rich. So to narrow it down to guns that I actually INTEND to own it comes down to:
1) An 8-shot 357 revolver w/4" barrel by a renown maker (I.E. not a Taurus, as I know they do make them).
2) An AR-15 variant chambered for 5.56 NATO.
So no particular makers, just something of good quality that fits those descriptions.