Looking for 200 watt Amp to drive Dynaudio Heritage speakers

Another vote for the Hegel H390. 250 wpc into 8ohms, 45 lbs. I share your distaste for cinder block behemoths. 

@cbrez, that was my thought exactly, high current over simply high wattage. I have heard the Dynaudio HS driven very nicely indeed buy Moon 240 and 250 (50Wpc at 8 Ohms). Importantly these are 85W and 100W pc at 4 Ohms, repectively.

If the sensitivity is what another poster mentioned (85) AND they are 4 ohms I'd go a little more power if you really want to get the SPL up with very low distortion.  I like the two monoblocks at 300w each idea the best.  Also and as suggested by that same post you can get more power with less weight and lower cost than your target all day long.  Not sure what the high-end people think about Emotiva but they have some great options.

REGA OSIRIS integrated amp pre-owned

A no compromise, super high performance, 162 W into 8 Ω (250 W, 4 Ω), dual mono amplifier housed in a custom Rega CNC machined aluminium case.

TECH SPECS

The Osiris uses a low distortion high linearity and a bandwidth common base voltage amplifier driver stage. This type of symmetrical circuit topology will provide the necessary voltage swings to enable the Osiris to drive any speaker system with the minimum of distortion.

Eight Sanken 200 W output transistors are used in a “triple” high current output stage enabling the Osiris to drive even the most awkward of speaker systems with ease.

The cascoded differential input amplifier uses two low noise LED referenced current generators. The open & closed loop feedback levels and gain bandwidth product components are optimised to give a tight and controlled sound stage, especially at the low frequency end of the audio range.

Nichicon audio grade capacitors are used in bypass and de-coupling positions. Electrolytic capacitors have been bypassed with polyester capacitors where necessary, improving on the HF performance. Low inductance film SM power resistors are used in the output stage.

POWER SUPPLIES

The Osiris uses two low noise, purpose designed 400 VA toroidal transformers using high-grade, fully bonded core material. The transformers are mounted to the chassis using Rega’s innovative mounting technique which eliminates noise being transferred from the transformer to the case when the transformers are operating under arduous mains (line) conditions with high levels of asymmetric mains (line) distortion. These transformers combined with 40,000 Micro Farads of Rega K-Power smoothing capacitors per channel, provide more than enough current to drive the hardest of loads.

All the power supplies utilise fast recovery rectifier diodes throughout. (Fast diodes generate less high frequency switching noise therefore giving rise to a cleaner DC). The input and low-level driver stages are fed from a regulated symmetrical tracking power supply with a low noise voltage reference, which provides a fully stabilised low noise voltage, ensuring the highest level of sonic purity.

All the dedicated audio power supplies feed only the audio circuits. The input switching, display & micro controller and protection circuits have their own dedicated supplies, keeping the audio signal path as pure as possible.

REVIEWS

Hypex Nilai 500. Low weight product getting great reviews by many but you also see mention of others that weren't feeling it. Alpha Audio has some video reviews with lots of music clips. Comparing the Nilai to other class D but also their Reference Pass Labs amp...all the amps are tested on some high end TAD speakers. I don't have the links but should be easy to find if interested. 

These Alpha Audio guys seem pretty legit, they have done some pretty good reviews on Power Supply's, amps, cables, etc. They normally do subjective opinions with objective data (measurements) in their reviews. The Nilai has peaked my interest and I'm going to try one out. It's a new technology so not your standard Ncore/Purifi type modules. It uses a different power supply and FR is linear past 20khz, where as the other models would roll off a DB or so before 20khz. You can try the mono blocks for around $2k us..stereo for $1500. Pretty cheap if they truly perform like many have said...but still  a product I would recommend buying with a good return policy in case it doesn't mesh well with your gear. Anyway, just thought I'd mention a small, low weight, cool running amp at a budget type price to go a long with all the other great hi end amps already mentioned. Good luck.