$23 for an opamp? As a single, it will be x2. For a Cmoy? :rofl:
I would stick to dual opamps, single socket for your first build. As someone else noted, if you use a dual DIP adapter to use a pair of singles, the chances of sticking this in an Altoids tin are slim and none due to height. You might want to look at the OPA2107... this seems to sound similar to the 627s, is a dual, and was always one of my favorites in a Cmoy.
Also, use 470uf caps instead of the 220uf you have listed. Look for some Panasonic FM, 470uf 25V (Mouser has them)
Go bigger on the input caps (or omit them). 0.47uf or even 1uf if you use them.
The pot you listed is mono, not stereo. Use the
RK0971221Z05.
This pot (same one Amb and Tangent sell) has a built-in power switch, so you can omit the switch in your BOM.
EDIT: I see that these are ~$17... I would stick with the OPA2132 or 2134 for starters, and work your way up.