It would be helpful to know what you are wanting to do with your playing...are you currently or wanting to start gigging? Bedroom playing? Playing along with songs you like? Pure practice and technique improvement?
No one has said anything on this topic so I will mention it, even though it is not for everyone. Have you considered amp modelling software? It is not great for all purposes (see first paragraph) but it is a great tool for pretty much everything but playing live. For example, I bought Revalver 4 a few months ago and I literally sold the rest of my physical gear, other than my guitars. I don't gig and don't plan to. I basically just try to grow my technique, play fun songs, and just play with the software/record. It is very fun
You get a huge array of amps, cabs, and effects that you can play a huge range of music with the base package, for around $100 dollars. If you are not a huge gear head, you could benefit from playing around on the amps and seeing what you like. Then in the future if you decide you want to move into the real world of tube amps, you have an idea of the sound you want. There are some comparison videos of amp simulators and real tube amps on youtube and the difference is negligible, most of the time. I'm not going to tell you that sims can match tubes in every situation, because everyone's view and ear is different.
Some other things to consider when looking into amp sims: -you need a computer (probably already have one. they make some offerings for tablets/phones too) -You need a way to listen (headphones are great and you probably have something already. I bought a set of studio monitors [FRFR] for playing out loud and they sound great for private playing. -You need a way to connect your guitar to your computer (some sound cards can do this out of the box. I bought an audio interface for under $85 and it came with the lite version of Ableton, which allows you to record your own tracks - so much fun) -This is totally optional, but I purchased a MIDI foot controller after the fact to allow control of effects [like wah] and patch switching. Bought one off ebay for $80 as well and there's literally no guitar music I cannot come close to, from a gear/sound standpoint [plenty of skill shortcomings]
tl;dr - Everyone's need is different, and if playing around the house is your thing, you should check out amp sim software. Since you don't usually unlock a true tube amp's potential until higher volume anyway, they can come pretty close. If you are wanting to play venues bigger than coffee shops and churches, probably wouldn't want amp software for that. So many options with the sims.