Center diff, lots of choices.

[JAILBIRD]

I am looking for a center diff for a brushless project. I know the RCM slipper diff is the best but I just can't swing the cash right now. What would be a good quality diff? One that sparked my interest was an Ofna Spyder diff because of the 6 spyder gears, but I know nothing about it. Any advice would be great.

Also, I will probably be upgrading to the RCM diff in the future.

Thanks.

-JB