I've had the hydroconquest gmt for almost a month now and it's incredible. It's not certified for COSC, but has been keeping time within those specs (-1.6/spd).

As someone that often uses a dive bezel and wears GMTs for travel, this was a no-brainer for me because it's a well executed 2 in 1 watch.

If you're not bothered by the dial shapes, go for Longines.

I've been wearing mine for the last 4 days and it's incredible. The dimensions are great, it's very comfortable on the wrist, bracelet is superb, crown action is the sturdiest I've experienced, and the brushed finish is perfect. And despite not being COSC certified, mine has been -3s/day which is just within COSC range.

I used to own an SBGC201 and it was my daily watch for over a year. I absolutely love the watch but it's thickness was a bit of a bother. I knocked it on stuff more than any other watch I've owned. Which might explain why all of a sudden, the chronograph hour hand fell off and was rattling between the dial and crystal.

I sent it into GS for repair and the watch was returned 6 months later. Then within 48 hours, the same hand came loose again. The turnaround for its second repair was 2 months and then I sold it.

That experience left a bad taste in my mouth for the GS chronos. I have purchased an SBGA415 since with no complaints.

Vacheron Constantin Overseas Dualtime in pink gold. 

Nope. It's a caller

I had this happen to the chrono hours hand on my SBGC201 after over a year on the wrist. I contacted the AD and they sent watch to GS for me.

When I received the watch back from GS, the same thing happened again 2 weeks later. I contacted GS directly that time and got it fixed again. 

It's disappointing to see this type of issue on watches at this price and supposed quality. I was so pissed when the hand fell off again and I wondered what they even did the first time. 

Congrats! It's such a handsome watch. I miss mine and if I stumble on a NOS like you did, I'll think it'd jump on it again.