I use both as well, as a new Kindle Touch owner I will continue to enjoying both types of Kindle depending on how I feel and which one I want to use when I go to 'pick up' a book. So to say.
I found the reports of sluggishness untrue when I began to use my Kindle Touch at the weekend, maybe if it had been sluggish a software update fixed it prior to the UK release?
When my hands and wrists are particularly painful and stiff I hope that using the touchscreen will be easier than continually pressing physical buttons on my Kindle Keyboard version for me.
