Newbie help - Building a system from scratch

Ok Swissified, you have a large room and you want to use a tube amp on a budget  listening to rowdy music. You are going to need very efficient Loudspeakers. I already know what you think too big is. Speakers always come first. Klipsch Heresy's should do fine. They are small, are very clean and neutral their only defect being a lack of significant bass below 40 Hz (just like every other floor stander near it's price range), they go very loud on minimal power and they have a very handsome retro look.
Rogue Cronus Magnum 3 will drive the Heresy's to an easy 110 dB no problem.  This system is now above the Rega 3's paygrade. I would go with a Clearaudio Concept/Satisfy tonearm and put a Charisma MM cartridge in it. The Charisma in perhaps the best rock and roll cartridge I have ever heard. You would have to spend serious money on a MC cartridge to get one as dynamic. Easily over 6 grand.  My Ortofon Windfeld Ti Cartridge, as great as it is can not keep up with the Charisma playing Rock and Jazz. 
Down the line you can think of hiding subwoofers somewhere:)
Oh, and just to give millercarbon a headache Tekton speakers are garbage.

If vinyl is going to be your prime source you should spend a tad more on the turntable. Technics make outstanding tables!!
https://www.overtureav.com/turntables-a-accessories/turntables/technics/

You should totally get the Double Impacts. Sound quality uber alles, and even the wife will eventually be won over with how good her favorite music sounds. Not kidding. Tekton has it down. Cover them up with dust covers if you must. 

But if not then like me and Mike both said you need more efficient speakers. Heresys will be fine. They won't have as great bass as DIs but even DIs will benefit from a DBA and that will be on your upgrade list but at $3k you can put it off for now. 

I agree with yogiboy its better to have a great turntable but that is one where I think you are much better off to start with something decent and learn. Because there's a lot going on with a turntable, a whole bunch of things make a huge difference and it just takes time and experience to know. There's only so much you can learn reading blog posts and reviews. Turntables and tone arms more than any other component you actually touch and handle the darn things and look at them up close and its really nice when you actually like all that stuff. This is something very hard to appreciate until you've been doing it a while. All of which is why I think its fine to start with something simple like the Rega.  

Again there is no right or wrong just a lot of different options with each one offering a different set of pros and cons.

The best advice I can give is not to follow the recommendations on one individual on this site, but to look for a measure of consensus.  Being audiophiles, there will never be anything approaching absolute consensus, of course.
That being said, glupson is steering you in the right direction.  I believe Crutchfield, Audio Advisor and Music Direct all have pretty generous return policies.  Try before you buy.  They're *your* ears.

In addition to the idea of ordering speakers you can return, look to see whether there are any local audiophile societies or groups in your area, and then go listen to as many different systems as possible, before you start ordering speakers you might then want to return.  Similarly, if you have established friends who are also audiophiles, go and listen.  When you do listen, consider the ancillary equipment and the room you're in.  Is it like yours in size, shape, window area, curtains or lack thereof, floor covering or lack thereof?  All that stuff counts big time.