When you're shopping for an amp with price per advertised watt ratio as your criteria, it will not end well. You will get an amp that performs poorly, will fail prematurely, and will hold little to no resale value (particularly if it blows itself up) when you actually decide to invest in something that works.
This is the reason all these brands pushing cheaply made over-rated Chinese garbage stay in business. Lucky for them there's one born every minute.
Incidentally, what sort of electrical system do you plan to power this 2500W with?