Vertical mouse is OK only if you never take your dominant hand off the mouse. Regular users tend to keep moving their hand between mouse and keyboard. Vertical mouse is very bad for this as it takes extra time and effort to both let it go and grab back again. Trackballs are bit better, but if you do follow the common click-click-type-type-click-clik pattern ...
I've used a compact IOGEAR keyboard on an HTPC before. I was impressed with how comfortable it felt to hold.
Product: IOGEAR Multimedia Keyboard (Model: GKM561R)
This keyboard has the following features:
Rubber grips on the sides
Separate scroll wheel and track ball
Mouse sensitivity adjustments
It does not have a charger though. It utilizes two ...
Finally, I opted for a different model, because it seems to have better support for Japanese language (which I also needed). However, for more general cases I think @Andy's answer is the best choice.
I bought this Japanese Bluetooth wireless trackball keyboard: Miyoshi's TK-BT01
If you liked the Logitech M570 they now have the MX Ergo Plus, it has received favorable reviews with some minor complaints; price being the biggest concern.
There's also the Elecom M-XPT1MRBK for a lower price, receiving favorable mention in the above review. The red trackball isn't for show, it improves the sensor's tracking.
Just buy the MX Ergo.
Unfortunately, trackballs are a fairly narrow market with not a ton of demand; unsurprisingly, this means that prices aren't exactly the most competitive. Finding something cheaper than the $50 Nakabayashi mouse with Bluetooth unfortunately is a rather tall order, and unfortunately, hackey solutions like converting a wired mouse to ...
This was a hard one to find!
This is my recommendation, the Griffin PowerMate Multi-Media Control Knob with Bluetooth Connectivity - Wirelessly control your Mac from Volume to Key Commands
It has software that will let you change what the knob does. So instead of Volumn Up/Down, you will make it scroll up/down.
The only reason I could see this not ...
What you're describing here is a drawing tablet, or a pen tablet, but usually all of these are made to act like a real pen, so left clicking is by pressing the pen tip on the pad's surface, or the screen in case of Cintiq or Surface pro or Samsung tablet 10.1 ... Etc many of these has even pen pressure sensitivity, some have tilt and rotation sensitivit. You ...