Amplifier Upgrade advice ?

depends on what you're trying to accomplish by upgrading the amp...give more details. I don't know how much experience you have with upgrading, but sonic magic does not necessarily occur following the outlay of $$...

Thanks guys for all the replies. Right now I don't have space to have more than one amp, someday I'll buy a stereo amp just for music. But I've to live with a 5 ch amp for now which will serve as HT and at the same time better than the Nak for 2 ch music.
I've talked with the owner of Odyssey some times back but no space to consider tht now.
I'll look into Sunfire and give Hillig a call.

Also, what do you think about Anthem MCA-5 Series II ?

I think by what I have gatherd this will be the Amp to beat in the near future!

Much is said about Class A Amps,but I do not believe most people need the Giant World Class Amps unless they have $$ to blow,the space to put them in or find a great deal on them.

ML,Threshold,Krell,Electrocompanient(?),Manley,VTL and the list goes on!

Best advice I give anyone looking at amps is to ask the Manf. what amps they use or the places that carry the speaker's.What is the best setup they have heard work best.Synergy betwween Amp & speaker's is the most important factor in your system!Get it wrong and you'll suffer!Happend to me with Maggies and HK amps!