Cham3l3on,
I'd say keep it. Sure, the Hasegawa kit is a lot "nicer" and has more detail and all that. But it depends on how you're gonna build it.
If you're building for the sake of building and don't care about creating a masterpiece show-stopper, do the Tamiya kit. I've had this one a few times, never built it , but it's a great kit in the box. Nicely molded.
A pal of mine did build one of these up, and it looks good. I've also seen some older reviews on the web for this one, and the only complaint was the lack of detail in the cockpit.
$10 was a pretty good price, and I'd say go for it!
Fade to Black...