Hello Boris, Theres a thread that adresses the quality between a 25K and a 50K cobra. I think this is the link to it:
Quality concerns between a $25k and $50K Cobra?
If your are looking for an afforadable turnkey, Levy racing does a turnkey Factory five for $29,500. Ill give you the link to that too.
http://www.levyracing.com./
hope this helps