Opinions needed; which is a better choice and why?

I agree with Jade, economics plays a role in integrateds and there are some good single box units out there. Playing Devil's advocate: keeping the amplifier and preamplifier seperate has it's advantages, allowing you to upgrade/change either the preamplifer or amplifier (or interconnect) to suit your tastes as budget allows. It also allows you to mix and match solid state and tubes, something I find desirable. If you have to decide on where to spend the cash I would lean towards a better preamplifier and acquire a decent amplifier that could be improved upon when you feel the need. Buying used means your budget goes a long way, lots to pick from here at A'gon! Jeff

To answer you intelligently we'd need to understand your associated equipment, listening room, musical tastes, and budget for a preamp/amp then you'd get a ton of recommendations. As for buying here, I've had nothing but success. Selling here...another story altogether