RM10s timbre match with M20?

iencoder
iencoder Posts: 1
edited July 2008 in Speakers
Hello, everyone. Some friendly advice would be really appreciated. Here's my situation. I currently own the following Polks:

RM10s (2 x front, 2 x rears)
RM202 (centre)
PSW10 (subwoofer)

A great deal has come up where I can get a pair of M20s really cheap. Would buying a pair of Polk M20 speakers (as fronts) timbre match well with my current RM10 speakers and offer an improvement in sound?

i.e:

M20s (2 x new fronts, replace existing RM10s)
RM10s (leave as is, 2 x rears)
RM202 (leave as is, centre)
PSW10 (leave as is, subwoofer)

Also, my Yamaha 6140B amp is currently set to a global 120Hz crossover for the smaller speakers, would that be a problem if I went forward with this? Any feedback would be HIGHLY appreciated - can't find much out there on forums for this particular situation... thanks!

Iencoder