Darylroy,
I would say there is a difference. I have owned every Reference center from the RC-25 up to the RC-7 (now all discontinued in the US) and can say that there is an improvement in dialogue from the RC-25 to the RC-35. Is it possible to save the money for an RC-7? Not to upsell you, but the price difference in minimal compared to the jump from the RC-35 to the RC-7. Anyway, I would say the RC-35 is a big enough jump to justify the cost, though if you can save for an RC-7 in the future, do that instead