I have several types of alternators around here and find the 10si easiest. I don't use a kit and it works like a charm with the original belt. The last alternator I bought (a few weeks ago) from O'Reilly was a rebuilt unit for just under $30. I did have to pay the $7 core charge. I did the whole thing for under $50.
There are lots of folks willing to post pics if you need them.