/u/Bro_Dave - for a grand, I would start with a brand new US-spec G85 with the 12-60 kit lens, a free 64GB card and a couple of extra batteries for $997.99 and worry about extra lenses later.
That said, if you're going to spend $1500 straight out of the gate, I would probably step up to an $1197.99 GH4 with V-LOG and a $297.04 used 12-60mm lens from Amazon Warehouse Deals.
No IBIS, but the V-LOG upgrade, 96fps slow motion and the headphone jack can be very useful to have. Plus, you'll have 10-bit output, if you ever want to record externally.
Here's the GH4 shooting 1080/96p slow motion:
Matsoe Matsoe - Summer Time (Panasonic GH4 96 fps Glidecam 4000)
FREEDOM - an action sports shortclip about it by Lake Alliance
Middles 23 Dec 2014 by Lars Petersen - Surf's up! (shot with the GH4 and a Canon 400mm lens)
Here is the more general image quality the camera can produce with graded V-LOG:
TONE MAPPING Video GH4 4K V-Log (internal h264 8bit ) by sxsxch (2160p)
Barbwire (Allen Stone) - Jaylon Ashaun Cover by CreativeHouse Motion
Los Profetas - Elévame [Official Video] by LCP Films Network
Band Promo // GH4 // V-Log by Play Reel Productions (crowd shots at ISO 5000)
GH4 // V-Log // Low light test 5000 iso by Play Reel Productions
The GH4 also has 10-bit output via HDMI, and can record 10-bit 4:2:2 video like this to an external recorder (the G85 is limited to 8-bit 4:2:0 internally and externally):
ATOMOS SHOGUN Sunset 4k source GH4 recorded PRORES HQ 4:2:2 10 Bit by lucapasturini (2160p)
Swissmiss Christmas Spot TV: 60 [Shot on the GH4 and Ninja Assassin] by Cameron Radice (1080p)
It's a pretty good still camera too.
In my view, the GH4 is a lot more camera for a little more money.
Hope this is helpful and good luck finding the right camera for your needs!