I've just come into a bit of cash and have been hit by a bad case of upgraditis. Just bought a new DAC and speakers (as below) and am now wondering if it's worth going for a power amp to biamp the proacs, (given that they're tiny). Any opinions? If so, which? I'm more than happy to go secondhand, and was considering either the MF3.2 (obvious choice really) or a pair of X-A200s. Would it matter much if I mixed makes between integrated and power amp? I'm leaving the country in a month or so and don't know the size of room I'll be moving into, but I want to get all possible upgrades done while a] I have the cash and b] I'm still in the country. Budget would be £300-£500