I'm a beginner

What are you doing? Movies or music? How big is your room? How loud does it need to be? What is your budget? Are you seriously thinking of following any advice from here? Before answering all the above questions? Already you got someone who knows nothing saying you need a pre-amp and a power amp. When almost certainly you'd be better off with an integrated. Or even a receiver. Who knows? Only you- and even then only after listening to the choices.

mlimpression, as millercarbon suggests you are going to have to give us a lot more info.

Start with whether you are looking for a home theater set up or just music set up or combo. Then let us know about the room size, etc. Then maybe what kind of music you are into if music is part of the equation and then, very important, your budget. You don't want someone to suggest $10,000 speaker cables if your budget is $15,000 for the system.

Lots of knowledgeable folks here who can help you out but you have to give them more to go on.

Thanks for your suggestions. Im in both but mainly in music. My full budget is between 10-15k. 

Check out this thread:

https://forum.audiogon.com/discussions/my-long-list-of-amplifiers-and-my-personal-review-of-each

The OP started out with Martin Logans and is back to Martin Logans now.  Ask him in the thread or email him and he'll give you his opinion on what might work best for you.

@mlimpression

General rule of thumb is the front stage (3 speakers in your case) should make up at least 50% of your budget. So contrary to @n80, yes you do want $10,000 speakers+sub on a $15K budget. What amp/preamp you get is minutely important relative to what speakers, sub(s), and room treatment you get.

All your power amplification needs to do is supply enough wattage, at low enough distortion, and be (in my opinion) relatively neutral.

Unless you need high spouse approval, don’t get a MartinLogan subwoofer; get one from say Rythmik or PowerSoundAudio. Also, going dual provides a lot of room benefits, 2x $1500 subs sounds a lot better than 1x $3000 sub.

Have you given any thoughts on room treatment? Room treatment makes a vastly more beneficial upgrade in sonics than even the most expensive amplifier in world would achieve.

I firmly stand my suggestion of something like the Denon X3500 mentioned; which again you can hook up external power amps in the future if you ever want to see if they have a good enough benefit to be worth it.