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/win 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.