Krell 302e or 402 e to drive my B&W 802 diamonds?

I recently bought a set of B&W 802 diamons and ordered a Krell 302 to drive them. I have the oportunity to upgrade to Krell 402e, and I whant to know if It makes sense to spend the extra money in therms of sound quality. Where I live I cannot audition such set of amp and speakers. Opinions wellcome.