If you like a traditional 26'er --- I'd keep my eye out on ebay for a Ritchey P-23 or something similar ---- 26" wheels are still available from Stan's and other makers at good prices . and put it together with a contemporary 1x10 drivetrain, and you have simplicity , classic good looks, and a modern drivetrain
26" wheels are going to be supported for a long time - One thing that is not supported though are 1" head tubes, so make sure you dont go too far back in years
Modern 29'ers are also made with longer top tubes, slacker head angles and use shorter stems to quicken the handling over bikes from just 4 or 5 years ago --- you might be surprised at the handling of a new 29'er -----
One im partial to is the re-introduced GT Xizang that was made in a limited run maybe a year or two ago