Help in building a KEF surround system


HI!
I would like some input on a KEF surround system I am currently building.
Right now I have 4 KEF 104.2 speakers,two of which I am the original owner.
I want to to build a 7.1 system.I have the marantz mm8003 and will be soon buying the av8003.
My questions are:
I can use the 104.2s for the sides and rear with the thought that I have an opportunity to buy some 105/3s that I can use for right and left fronts.
Would these match sound wise? Should I buy two more 104.2s for the right and left fronts and stay with that? If not what would you recommend for the right and lefts?
Lastly what center channel would you recommend? I have read that the 200c is a good match but good luck finding one.I do want everything to match sound wise so your input would be well appreciated.
I also have but have not built yet 2 Dayton RSS390HF-4 15" Reference HF Subwoofers with 2 1000 watt amps.
Thanks for your help!!
rydmoto

Showing 2 responses by rydmoto

Thank you for your help.

As far as a center channel goes...any other recommendations?
I talked to KEF USA and was told the IQ60c would be a good match.Does anybody have an opinion on that?
Perhaps i will get lucky and find a 200c for sale soon.
Thank you Java and others for you feedback.At some point I will be doing an addition the my house and would design a room large enough to accommodate the 104.2s.But now you got me rethinking everything as I have no experience at all using a surround system.I might play at first with my 104.2s as is in my smaller room to see what I hear etc.If the sides and rear channels do not put out any so to speak 20-20000 "full range" material as the center and left and rights would then it would be overkill.If the sides and rear are just simply "fill" then you are for sure right.Does the center channel usually have "full range" material going to them sound wise?
If so then I will invest well in those.
I really appreciate everyone's feedback so far.
Got me to thinking!!! again!! lol