Everyone is pissed at Ontario right now so I would say RD7. The rat-7 is now a pirated knife so I wouldn't give them any business. The RC-6 would be a better slicer than either BTW but it doesnt make any sense to buy a 6" knife when you have a 5" one. If you will be carrying the seal pup with you on all excursions, you might as well get the 9 incher you'v been wanting. Also the falkniven A2 is longer than the A1 at 8 inches but I prefer a good carbon or tool steel over stainless any day.
I know you will probably not follow this advise (and I dont blame you) but If you already have a small fixed blade, get a good fiskars or wetterling hatchet at one third the price of a Ranger, ontario or Fallkniven.
I am a firm believer in the nessmuk trio, a Small fixed blade, hatchet and a multitool will get you through anything.