When i first started playing i knew zero about poker, and one of the first things i started with was Tournament Indicator. It didn't have the HUD feature, or replayer or anything, but was helpful for figuring out starting hands, and was an introduction to pot odds
But i definitely recommend either HM2 or PT4. i used PT4 initially, but decided to try HM2 and really like it. Has cool features, and i like that apps like Notecaddy, Leakbuster, Tablescanner are intergrated right into the program. But i guess it is kind of up to your personal preference.
I"ve seen people have complaints about both HM2 and PT4, and i'm not sure if it is just a speed issue or what. I haven't had any issues with either, but i did build a new PC this past year, and i highly recommend going with an SSD drive. Will speed things up a lot.