I actually got Dreamweaver album first which blew me away, then I heard trax - I For an Eye, Hosanna In Excelsis, Those Who Died on a compilation called Doomsday News 3 (filmed live in Germany just after they tore the wall down), there was also a video issued which coincidently, also ruled. Ahh many a night spent headbanging to those - The compilation also featured Tankard, Kreator and Coroner...
Sabbats first two albums are definitely worth buying because if you got the time to spare, the lyrics are some of the best and the artwork (on both) is wicked too.