which is better? Stereo Amp or Monoblocks?

You coud use two sterao amps bi wired if you are worried about seperation. I have used both but not for years. Krell was the last. It is easier to lift the monos!

Over generalized rule:
Cost no object:
 usually monos.
Value prioritised: 
usually stereo.
Many exceptions.

I have had both. Stringsteen has it right

I think separates is the best when it comes to home theater.

Have you considered something like the BAT VK-6200?  Separate amplifiers in a single chassis?

Mono amps tend to excel in:

• Stereo separation
• Power supply
• Current delivery
• Heat dissipation

If you have difficult to drive speakers, or just want to have the absolutely most solid amplifier possible that is the way to go. You aren't going to find a 200 W class A amplifier that goes down to 1 Ohm (1600W) in a single chassis, the power supply and heat sink requirements are monstrous.

But better...... meh.

In a HT that I could afford to live in however, I’d be looking at the ATI or NAD digital amplifiers based on Hypex modules. Smaller and more compact units are much more attractive to me these days.

Best,

E