biamping with 75 watt solid state and 18 watt tube amp.klipsch rp600m...t

"...can anyone out there help me figure out what am i to expect..."

I'm still not sure what you are trying to do but you are not going to be happy. Despite their claim of efficiency the Klipsch loudspeakers need a little power to sound best. Bi-amping with cheap amps will not get you there. You will want a smooth SS amp or a 25 plus watt all tube amp. I'm thinking you may not have enough budget to tame those loudspeakers for anything other than just background music. 

75watt and 18watt amps will have different gains.  How are you going to adjust for that?

biamping 400 dollar a pair speakers with tubes and solid state - haha

suggestion - for better sound, get better speakers!!  

have fun!

"...suggestion - for better sound, get better speakers!!..."

The bookshelf Klipsch with a nice Musical Fidelity integrated would be a nice little system. 

Get amps with a pair of balls. 
 18 watts? Really? That’s like baseball with a whiffle bat. 
 18 watts, 75 watts,..........this is your problem!