Agreed. Triple Ecchi proved itself amazing with those two. If you don't mind yuri, I'd also recommend Sono Hanabira ni Kuchizuke wo - Anata wo Tsunagi Koibito (both the OVA anf the game it was based on) and Shoujo Sect ~Innocent Lovers~..
Also,I'd recommend Stringendo (not any of the related series - Accelerando, Stretta, or Stringendo x Accelerando Ultimatum Sera; they're quite a bit more... colored by fetishes), Consenting Adultery, Dirty Laundry, First Love (this one especially; they're getting REALLY good writing), Kimihagu, and Shimaizuma (otherwise known as Fleshdance).
Fellow posters, feel free to make your opinions known.