I was checking my rails and im not sure if there within reasonable limits my 12+ is 12.48, is this ok or what? its a generic (i actually think its a deer) peice of crap and i havent had any problems before.

You have nothing to worry about! Those #'s are fine...

I thought they were ok, i suppose im just looking an exuse to buy a antec true blue for my comp

IMPORTANT:::::

Life and death situation man, not your numbers the PS itself.
I do pc repair and i've seen too many of those "system killers"(that's what we call them) in my shop get it out of your case pronto. and use it as a test PSU for your mods
DEER power supplies are the crap of craps when they blow they take almost always all your system with them HDD mobo ram everything, if i make you nervous that's exactly what i intend to do this is no joke!!!
This month only i've bought hundreds of dollars worth of stuff for peeps who had DEER psu's in their cases,i can even tell you how they blow,(if you wait that long) it will go in the resistors right in front of the fan, inside poof black spot.But if you see this your system will be "dead" i can swear this to you,
It's your move

I think the general rule is if it's within +/- 5%, then you're doing fine.
So, you're looking at a range of +11.4 to +12.6 for +12V.