Bought the Panasonic RP-62 on Sunday... and figured since previous Panny's had the coax, this one would. (Yes, it was an impulse buy!). But now it has to go back. I've seen two Sony models... the DVPNS700p and the DVPNS715p... anyone know the difference? Or if they're any good? I'd like to return the Panny tomorrow. Don't really want to spend much more than $200 (Paid $179 at Sears for the RP-62) but I also want to make sure I'm buying quality. Help!!