Id personally for go the beer tokens / treating yourself and save up the for the ST2. I havent seen an ST1 but I reckon its the one to go for. I think when I asked my dealer all of the ones he had sold where ST2's.
I think some of the additions to the 2 are really trick.
If anyone can remember wen the st225 came out in 05 they sold more st2s/3s than st1s as that also looked pants
Back then i ordered an st3 as it was more spec'd an the main thing for me was xenon head lights so i am with you on that one as ford will and have sold more fiesta st2s than ones .