It may be a matter of taste, but Argentinian does not usually sound really "ugly" for us, it usually sounds funny because of its sing-songy sound. We find sing-songy accents such as Argentinian, Galician or Asturian accents funny, also Italian accent is funny for us. Anyway some women find it sexy. But few people consider it "beautiful", since it sounds really strange and unfamiliar when compared to other accents because of that sing-songy sound.
It's not true that b and v are distinguished in Argentinian. Actually they're not distinguished in any variety. Moreover modern orthography does not reflect the distribution of those letters as they were pronounced in Medieval Spanish, so it would be ridiculous if any dialect preserved the distinction as reflected in modern orthography. In Medieval Spanish "haber" was written "aver" or "haver" (as in Portuguese) and cantaba was written "cantava" (as in Portuguese) and that reflected the actual pronunciation. Portuguese retains the old orthography and pronunciation of v's. But long after the distinction was lost, modern orthography underwent a reform in the XVIII century and some words started to be written with the Latin spelling, which does not reflect medieval pronunciation.