Sorry euge, I didn't mean to start a feeding frenzy!
I've actually moved away from Sapphire in martinis recently. It's still my favorite in a G&T, but I like more straightforward gins, especially when playing around with different olives. Beefeater is what I'm drinking right now. Saving some money doesn't hurt either.
Tuna stuffed olives sound awesome; I'll have to try to get some.