I wrote something about the 7500 yesterday but it seems to have dissapeared.
Here it is again, more or less.
First, don't judge this one on the demo's on YouTube it is not fair because the soundquality is MUCH better than you can get out of a computer.
It is a very GOOD keyboard FOR THE MONEY but as with every keyboard (and I had a few) there are pros and cons.
It has some very good Tones 'Voices' like piano's and saxes any many others. Violins I find so so. It has many rhythms 'styles' and you can also tweak them to your liking and store them in user area's.
Sounds are of course a matter of personal taste!
It has GRRRRRR only 2 variations!!!! but you can easy store 96 variations in memory if you need that many
No midi in out but an USB-B connector so you can connect to a computer using a simple (printer)cable like many newer keyboard these days.
Onboard speakers are pretty weak, I feed the line out to powered speakers and that makes a very BIG difference in sound quality.
The buttons, although they do the job fine, I find a bit small and the OS and display clumsy but that is my opinion.
Loading a song from the SD card takes quite long and you have to start with number 1 again and again (or I do something wrong).
Drawbars.... mmmmm... only 3 steps and 'home' and you hear the changes slightly when used when you play at the same time.
But in short, a 76 full size keys keyboard with so many gadgets, bells and wissles, recording and play back, microphone in etc etc etc. you can't go wrong. I don't think other brands come even close in this pricerange.