To me, it is worth driving to hold test drive airguns - and meet people-.
I had one person drive 4-1/2hours one way to shoot airguns at my house ( had a decent collection then ) and they felt it well worth the drive.
A much better bet ( yes it's a drive for you but well worth it) is to get to a Field Target match. I personally know a lot of Southern FT shooters, I know of 5 who shoot 3p also- likely more just just never came up-, just because it's "FT" does NOT mean someone there does NOT own just about any airgun ever made and they are willing to let you try theirs.
You simply want a new airgun, got it.
At 50 yards with the correct pellet your Gauntlet should shoot dime sized 50 shot groups with the right pellet. Fun can be had tinkering with it if it does not already give these results.
Someone mentioned triggers ( big thing with me personally ) at about 16oz for the FX and 15oz for the Outlaw - reviewers out of the box listed numbers - I would certainly call them a tie.
Someone mentioned the "unknown" QC of the Outlaw but it has been in production a good long while under different names, is made by the folks who make a lot of pre-charged airguns for others names and, Diana/dealers have placed there personal QC requirements for their runs. The internal machining looks very good, better than too many $1,000+ rigs.
Reckon it's only me but FX QC seems a bit spotty ever since the new shop started up. Once upon a time FX YES ( remember the Thor ? ) now I personally could not be talked into spending money on one of the newest models, then again if I had spare money???
Go to a match or at least a show, they are what I would call , close to you. You'll have a good time and develop TOO many idea's on what you might "need" in the near future.
You might find ( might find one for sale ) you actually like the MAR , at 600+fps it wouldnt be much at 50 yards but the only one I've seen ( from Scott ) shotb one hole at 25.
Want some fit & finish used Air Arms are selling way cheap these days. Heck anything except what's coming out next is selling low used. Face to face makes used a wonderful thing.
Please do think abouit taking a drive to a shoot.
John