I think that 12 x 25¢ and 22 x $1.00 is a great starting stack for a game where you want lots of $1s on the table to splash around. This will support either a .25/.50 or .50/1.00 NL game with no problem. Then you fill in with however many $5s on top of that for your initial buy-in, up to about $200.
I don't think you need more 25¢ chips, however. Make your rebuys with only $1 and/or $5 chips, and make change on the table. In our experience, having 100-120 of the 25¢ chips is enough for 10 players. If you keep rebuying with 25¢ chips, you'll have too damn many of those useless little suckers sitting around.
Buy more $5 chips instead of 25¢ chips and you'll get more "bank" for your buck.
Also, you might want to see exactly how many chips fit in that "650" case. Many times a case will fit extras (could be 26?) and of course you want to fill the case up, don't you?!?
