smallstonefan
I've got the Acer T232HL running at 1920x1080. That happens to be the max resolution, but even if it wasn't I don't think I'd want to run it higher as that would make some things like tapping Solo buttons more difficult.

Some people speculated that the 22/23" size at 1920x1080 is a bit small to operate some of the smaller controls.  Do you think it would be much better with a 27" monitor?   Or is going to a lower resolution to make everything bigger going to work better?

Well, realize that <most> monitors are going to run 1920x1080, which is HD. There are exceptions, but they are expensive and I don't think they support touch. For example, my primary monitor is a Dell 27" and it goes to something over 2400+x1900+. So, a 27" touch will probably be 1920x1080 - the same as the 23". That means everything WILL be bigger. If the resolution stays the same, you get  bigger stuff with a bigger monitor. If you move up to a higher resolution as you move up to a bigger monitor, that is not the case.
 
I will add that OF COURSE it will be better on a 27" touch monitor. :) However, I find it usable on a 23". Only you can really judge that.
 
If you can swing the cost for the 27" touch, I'd say go for it...
 
Hope this helps.

Sound On Sound, http://www.soundonsound.com/ November 2104 issue:
has a lengthy article titled “Multi-touch Music Software for Windows”.