Cool, I was also wondering how good the 26" would be for other things, nothing major but I’ve used my original uni to a point where the cranks broken and gets very loose. Things like one foot riding, hopping and some mounts.
THe newer unicyucles use a stronger crank interface so that is no longer an issue.
If you want to use your new Uni for trials and tricks the maybe a 24" would be better, Unicycles are always a compromise which is why people tend to have several for different activities. I have a 24" for jumping about doing trials/ big street etc, a 29 and a 36" MUnis for XC/road riding.
A 24" will let you go offroad and for many years was what everybody road, but it is slow and the smaller wheel is effected by bumps more, a big wheel rolls over them more easily.
You need to decide what you will be doing more of. you may want to get a 24" to do your tricks and experience the joys of MUni then when you get hooked (which you will :p) get a bigger wheel (29") for offroad and keep your 24" for trials/tricks etc.
One Uni is never enough (I have gone through 6 in a year of riding :p)
+1 on the 24. Probably the most versatile uni. You can do some tricks and muni. If I had to choose one uni it would be a good old 24, though be aware of the tire size. You can find a lot more tires in the 26.
The 24 is more versatile. The 24 really isn’t ideal for trials and a lot of tricks but you can most likely manage. I’ve ridden 24 and 26 muni and the 24 is slower, but I feel more in control with it and can do more technical muni with it, and the 26 is faster, slightly more fun, and rolls over things easier.
~ As to others have said… 24 is better for more tech terrain, less fitness, less skill, trials on side of trail, and climbing. Tech is relative, what is fun XC for one is knarly Muni to another. Also dependent on your terrain, what is legal expert trails here would prob barely be intermediate in north shore Vancouver.
If you want to ride as much as possible right away, I’d get a 24. As your fitness (uni specific) and skill increase you may want to move up. I’d get a used 24, & after a while, upgrade size and/or quality of the uni.