Do you have a need for a carry gun? If so, the G19 is hard to beat. If a competition level gun is what you need it's hard to beat the G17L MOS or G34 MOS varieties.
I'm a GSSF member, so I've so far purchased a G34, G19, and G30SF. Next one will probably be a G21 and I'll add a MOS to it. I'm in CA so I have to stick to the lesser G3's vs G4 or G5 versions.