I liked the 450's handling, but compared to the Canadair stretch 604 (CRJ) the 450 sure required a lot more rudder on the V1 cuts. It even requires more than the A320, but then again that is a FBW plane. When I was running the instructor panel I usually set the V1 cuts to happen at V1 + 5 to 10 kts the first few times to gauge my student's reaction times.

The G wizz planes are very well supported and bullet proof so you will enjoy that aspect of flying them.

I guess 'ancient systems' is based on one's experiences. I thought the cabin smoke removal procedure was less than suitable for such a great plane, and I quickly tired of looking for the aux hydraulic pump switch. We were also prohibited from teaching the 'one fuel pump on' keep the fuel tanks balanced single engine procedure as it is not a documented Gulfstream procedure. OTOH, the Planeview + EVS with auto throttles makes it a very precise plane to fly, very enjoyable. I always said one could fly up a gnat's behind with that HUD/EVS combo.

You're impression is right. I've flown Falcons and Gulfstreams and at times I've been dual qualified bouncing between airframes. A completely different school of thought behind each brand. They couldn't handle any more differently but are BOTH great airplanes.

Yeah, the whole FIRE section in the QRH needs to be rewritten. Of course it was GAC's lawyers that wrote the QRH in the first place. That thing is anything but quick. I recommend the iPad version of Planebook.