If you're going with the Sea-Gull ST19 -aka "Lemania"- that means you're not going for a DW Daytona. You have to realize that DW's 7750s are the best vintage Daytonas you can buy for less than $1000. Yes, the subdial spacing is off (by <0.5mm), but it is a more accurate rep than what the cartels sell in almost every other way. The asymmetrical pusher layout (i.e. reset pusher is farther from the crown than the start/stop) is the most noticeable feature, but it's not just that. For a 'budget' case, the dimensions of DW's 6239 and 6263 are remarkably close to gen, and they will accept gen parts with little or no modifications required.
I suppose you could choose the ST19-based rep if reliability were all-important, but there's no reason why the 7750 can't be made to last. You could have the movement serviced immediately, or you could have have a watchsmith remove the auto-wind gears, as praetor suggested. I have one rep with a modified 7750 (16 months) and one with a stock movement (9 months). Neither has failed yet.
Bi-compax means the ST19 has two functional subdials. It has no hour counter at 6, so the one on the cartel rep is a dummy.
Please post a picture of your 7 Daytonas! Give everyone a chance to take apart the bad ones!