Hello I am new here, so please don't kill me for not searching around before posting this. I am a bit stressed out and short on time. Alright. After receiving an email from HP saying my warranty has expired, and seeing that none of their trouble shooting techniques could save my HP 49g+ I am left in making one decision. It is time for a new calculator. I have had my HP 49g+ for about 4 years now. I got it when I was in 7th grade for a geometry course, and was told I would not need another calculator as long as I took math. I guess they were wrong. Anyway, throughout that time, I have continuously used TI calculators as well, mostly TI-84s and TI-89s. I find they are much easier to use. It has always been difficult being the black sheep in my math class, the guy with the HP calculator that no one knows how to work. Even my Calculus teacher looks at the HPs as if they were foreign objects. So, I am now faced with the decision with choosing between a TI-89 and a HP-50. Due to recent problems with my HP-49g+ I am a bit hesitant to stay with HP. I have had my calculator all this time, and have still yet to become comfortable with using RPN mode. This is something that HP is known for in their calculators which I can not use to this day. I am sure many of you are familiar with both TIs and HPs. I am a sophomore now, in a college-level Calculus course. I will need a calculator that should last me through the rest of high school (Calculus BC and Multi-Variable Calculus) and possibly college. Are the HP 50s good calculators? Do they have as many problems as the HP 49+g? What are the main upgrades/differences between the HP 49g+ and the new HP 50, besides colour. I am willing to learn, as long as I get the best calculator with my money. Lots of question, and little time. I appreciate your responses. P.S. Many of my friends who own TI-89s say there are a ton of programs that are beneficial for classes such as Chem AP, Physics, AP, and other college-level science courses. Would a TI-89 be superior to the HP 50 when taking this into consideration?