My daughter needs the TI-84 Plus or TI-84 Plus Silver for her Honors Algebra 2. STAPLES has the TI-84 Plus on sale next week for $89.99. The TI-84 Plus Silver Edition is $109.98 at Wal-Mart and $128 at STAPLES. I don't know anything about these calculators. Does anyone know if the Silver Edition has anything special that she would need in the future? I don't want to spend the extra $20 just for a changeable faceplate.