I open 1m (whichever is systemic). These aces are too good especially when they're coupled with a nice honour combination in both majors. The stray jack of clubs is a negative feature, but not enough to persuade me not to upgrade. I guess on average partner will have 7 highs and he will never be stayman-ing my 1NT opening (sometimes with 8 highs too). I guess it's not about wanting to "upgrade this to an 18-19NT" but rather hoping for the auction 1m-1M-3M-4M when partner will be passing a 1NT opening. Yes I may get to bad 4M game, but sometimes it gets us to a good game, or a bad one that makes, and I'm willing to risk it rather than to play in 1NT. As a side note, last two times I opened 1m with these type of hands, one it got us to a cold game when partner had the exact hand type I described (balanced 4234 with 7 highs) when the rest of the field played in 1NT+3, and second time partner had a complete yarborough and opponents bid to an aggressive 3NT doubled for one off - take it for what you will.