Since you already use an Excal in the water then consider a Sovereign for land. Same tones but better audio thanks to being able to use a good set of headphones on the Sovereign compared to the stock ones on the Excal. The Sovereign can be hip or chest mounted to make the shaft weigh virtually nothing. I don't care for chest mounting unless I'm water hunting with my GT, so I built a cheap/easy homemade shaft and with a few other simple replacement parts (whites arm cup, whites tall man carbon fiber lower rod, running 3 cell lipo in akaline holder) I dropped almost a pound and a half off the stock weight of the GT. Now it's as light as I'd ever want, and I've still got the stock shaft setup which I use for my water rig when chest mounting the GT. But on land I prefer the control box on the shaft, which is why I built my homemade light land rig.
The biggest bonus is you want have a learning curve since an Excal is essentially a waterproof Sovereign. And you can stick a 180 meter on your Sovereign and have a great very high resolution ID in the foil to copper penny range to split hairs more on things like nickles or rings versus tabs and such.
Or, another consideration is like they suggest- An AT Pro. Then you've got not only a second water machine should one or the other fail, but also it'll hit on finer gold better than the Excal will in the water. The Minelabs will bang even the thinnest of gold rings at super depths due to a ring being an intact loop, but in terms of fine gold like thin chains or tiny gold earings I hear the AT Pro is much better at that stuff, which can be a perk in the water on days where you are in the mood to look for more gold then just rings with your Excal. Then the added bonus is the AT Pro makes a great land machine with it's full function LCD screen and decent weight. Sooner or later one of them is going into my line up of machines. The price is just too good to not pick one up IMO.