I tried my hand at making a couple of cabinet doors this weekend and
they came out OK for a first try. I don't have a Rail and Stile bit
set (yet) so here's what I did, just to make a couple of protoypes to
show SWMBO:

The frame was made from 3/4 poplar, the panel was 1/4 luan.

I used a round-over bit on the inside of the 2 3/4" frame, a cove bit
on the outside and a 1/4" straight bit for the plywood panel.

I used miter joints at the corners and #10 biscuits to join them.

Things I learned:

1 - I need a new 1/4 straight bit
2 - My miter saw needs a bit of adjustment
3 - When you do an eyeball test with #0 biscuits and set the biscuit
joiner to #0, then decide that you have room for #10 biscuits, you
really should change the setting on the joiner or it's really hard to
get the miters to close fully. #10 biscuits in a #0 slot are really
tight! ;-) I guess that's why we dry fit first, isn't it?

OK, so if I decide that I'm really going to make 19 doors and 6
drawers, I need to improve my process. I'm considering using a Rail
and Stile bit set but before I invest in a set, I have 2 main
questions:

1 - Is a PC 690 (1 3/4 HP, single speed) router powerful enough to use
with a Rail and Stile bit set?
2 - What's the trick to ensure a perfectly square cope on the end
grain of the rails?

I've been checking out some videos and doing some reading on making
cabinet doors, but I'm very open to all suggestions, including books
or websites.

Thanks!