for the wattage your looking for tube amp's will be big $$$$
plus the type's of tube's used to produce such high wattage's in tube amp's are also extremely expensive not to mention requiring biasing of the tube's & unless you know what your doing you can get an extreme shock or worse.
tube amp's & solid state amp's are good at two entirely different thing's,solid state amp's excell on slam & dynamic's where as tube amp's excell at lower volume's & tend to have a more foward type sound that excell's in the mid's & high's,not very many tube amp's will give an accurate bass response when driven even with high effeciency speaker's.
tube amp's are more suited to low to medium volume listening with high rated speakers,like 98db & up,a well made & properly biased tube amp tend's to produce more accurate mid's & high's over a solid state amp at lower volume's & their bass response is more of a mid bass as oposed to a full bass,the more power you use from most tube amp's the less bass response you will get,after about 50% of the power is used from a tube amp the remaing wattage start's to become more distorted & will continue to produce more & more distortion due to the fact that they will continue to produce power even thru a full clip,tube amp's are also more likely to be affected by rfi interference over solid state amp's & also can be easily affected by an unclean power source or other devices with back ground noise on the same circut such as microwave's,refrigerator's,clock radios ect.
tube amp's work very well for biamping with a solid state amp driving the woofer's & tube's on top driving the mid's & high's .
solid state amp's on the other hand are generaly a cleaner more stable source of power & are able to reproduce a better bass response & handle transient's & high power burst's alot better thus creating a better sense of dynamic's.
choosing any amplifier is highly system dependant & before any quality reccomendation's can be given more info is needed.
1 budget.
2 associated gear.
3 listening level's.
4 music preference's.