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

What are you going to use to split the frequencies?

EDIT: Are you using an AVR for your SS power? 

"...This speakers are very good if you match them correctly..."

Yes they are, they should respond nicely to good gear. I have a pair of Heresy IIIs running off of a chip amp and while it's amazing that it plays as well as it does with the cheap amp, they are way better with decent gear. Same with my RFs. 

"...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. 

"...the OP is using a pair of Klipsch bookshelf speakers and they have a sensitivity of 96 dB.....so a amp with 75 wpc is more than enough..."

Except Klipsch efficiency ratings are a bit optimistic and it's a 38 wpc amp into 8 ohms (maybe).  

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

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