Well the first part of your statement is correct but then you went ahead and put your foot in your mouth by claiming CCA is "unreliable." That CCA is rated for 250A and the OFC is 300A, that's it. From an electrical standpoint it's no less "reliable" than the OFC and I can guarantee the OP won't be able to tell the difference once it's installed.
To the OP: The CCA can be a bit harder to work with but if money is tight it will work just fine for your application. KnuKonceptz also sells set screw ring terminals but a word of warning, if you use those under the hood they WILL corrode and they are damn expensive. I would suggest using the money to buy some decent crimp terminals, a swedge on ($7 from weldingsupply.com), a heat gun ($10 from Harbor Freight), and some heatshrink ($2 Harbor Freight). If you take the time to crimp and shrink them you will NEVER have to worry about the cable coming loose or water getting in there, much better option IMO.