You wanna wreck your phone gringo. Then go right ahead and load OS 4.5 beta. I have loaded it 3 times on my 8310 (which is currently my 2nd phone) and 3 times I have gone back to the released version.
The new features are cool but, really, just wait. The reason it is in beta is to test for bugs and the reason it ain't released is,..... because its full o' bugs (and in carrier certification) but ya know what I mean.