TUBE or S/S Phono Amp with an all s/s system?

I looking for a phono amp with mm/mc (high output) with better than average gain. I'm using KreLL pre & KreLL amp, cartridge is Grado Reference. I understand output impedance is something to consider when trying to match components...so which way would you go, tube or s/s for phono amp? What specs should I be looking for?

KreLL amp input impedance > 47K
KreLL preamp input impedance > 47K / output impedance 10ohms

I'm quite "green" as far as "tech" talk goes, so I'll be the first to admit that I have a deficiency in this area.

Thanks for your advice,

TSDS
(technical specifications deficiency syndrome)