Alex you cant go past the Canon 5D although a few years old it will give perfect images with extremely low noise.
When they were first on the market they cost $5000.00 body only, now one one can get one for under $500.00 and they still do the same job.
I have 3 and use them all the time, well not all at once of coarse
If you want a good second hand one send a PM
Leon