If I were limiting myself to the 30-30 or the 35 Rem...the 35 Hands Down.. Just got more oommph in my opinion. BUT I wouldn't limit myself to those calibers. I have a Winchester 88 in 308 and a Savage 99 in 308. Easy to carry and easy to shoot. Little more recoil than a 30-30 but not that much. Better stock designs and easier scope mounting too
BTW I have a 35 Remington 141 pump and a Marlin 335 in 35 Rem.. Also got rid of all my 30-30's except the pre war 94 and a Rem 788 in 30-30(but they are collectibles) The 35 just does better