i need to buy some bearings for the front and rear sierra hubs.

now im a bit confused on which ones to get.

the ones for abs are more expensive (the hubs originally had Abs), but as i won't be using abs, can i use the cheape non abs bearings?

also any reccomended bearings or websites for them?

cheers

The rears definatly come in 2 different sizes and can't be interchanged.

so i will need to get the ones for Abs model?

Yes!

I ordered some from my local motorfactors and they were only £11 a set for the ABS ones and £8 set for the non ABS.

You may find this useful.
http://compass2.vsm.skf.temp.pi.se/Index_Car.aspx?page=cars/carToKits.ascx&language=en-GB

SKF and Timken and the best Bearings available closely followed by GKN so quality is top notch. Delphi tend to be good quality also.