well, I've come in to this thread rather late. what's your budget?
Asus has some really good deals through MS Canada's website. an example would be:
Buy ASUS ZenBook UX305CA-UHM4T Signature Edition Laptop - Microsoft Store Online
if you're not doing any heavy computing, but just your usual day to day tasks, you won't have any issues with the Core M processor. my SP4 often clocks itself down to 700mhz and I notice no slow down or lag anywhere.
alternatively, while running an Atom, did you consider the Surface 3 tablet? dang small and lite...
or you could look at the SP4 with the Core M and 4GB RAM on the 64GB or 128GB SSD.