The AG75 has a 43mm nut, which is the same as an American Special Strat or Tele. If you're playing a Standard Strat then the nut width is likely to be 42mm.
This leads me to think that any playability issues you might be having with the Ibanez lie elsewhere.
It might be like Mr. Beaumont says, and the guitar is just poorly set up. A badly cut nut, sprouting or uneven frets, or a maladjusted truss rod can make playability a nightmarish chore, constantly fighting buzz and intonation issues.
Honestly, a halfway well made, well set up archtop should be easy and comfortable to play. If it's a technical challenge (especially compared to an acoustic), then something is up.
PS: Every AG75 I ever tried in the stores was really poorly set up.
PPS: The Eastman AR371 mentioned above is 1.75" at the nut, which I believe translates to 44.5mm which I love. Lots of room.
