Tubes for HT?

What do you folks think about using tube monoblock amps for HT (amplification specifically for the 3 front chanels, L/C/R)? I've been thinking of swapping my Musical Fidelity M250 Monoblocks with a tube amp. I'm kinda yearning for the sweet, warm sound of tubes. I'm not familiar with tubes being used for HT, so I'm a little concerned about clipping (power output), heat, realibility etc. I'm guessing you folks know where I'm coming from on this one... Call it a dual purpose system, if there is such a thing.

I Spoke to Kevin @ Upscale Audio and he recommends the Prologue 6 Monoblocks (@70 watts). He said that the Prologue 6 will do great in a dual purpose Music and HT set-up. Have you folks had any experience using Prima Luna in a HT environment?

I would love to hear what you guys think.

Thanks