^^^THIS!
@jjjuser47,
Without a solid plan in place, you, like most of us, are going to wind up costing yourself more money in the long-run, because you'll more than likely be underwhelmed with purchases made without first being diligent in the research prior to spending, which will also help in understanding
the right questions to ask, because as you can see already, just by asking a basic question regarding Sub A vs. Sub B, you're going to get a bunch of different responses that can/will cause some to get a bit overwhelmed, which also leads to what we call "Analysis Paralysis", and trust me...that doesn't help at all.
I say this, because without first knowing what it's going to take to reach a particular goal, you're just aimlessly throwing money at something that you don't have the proper understanding of the performance that it will give you. Meaning, if you like to listen at louder volumes (not necessarily at reference volumes, but louder) and you're only planning to use an AVR to power them, you'll want to take a speaker's sensitivity rating into consideration (as well as listening distance from them), because the higher it is, the less power it will take to drive them to higher sound pressure levels. If you want a greater impact level from your low end, meaning subs, and you want to
FEEL those explosions or the pounding footsteps of a T-Rex and Kong, then you'll need bigger, better subs in order to achieve that goal. Not to mention having the extra headroom necessary to prevent driving the subs to their limits in critical moments where peak levels can get pretty high sometimes with those explosions in movies, or just wanting to jam out on some bass heavy content in music.
The things I've mentioned will also help give you a better understanding of what your
realistic budget should be, so this is why I will always try to encourage folks that are new to the hobby to exercise some patience and do their proper due diligence prior to making any purchase decisions, because like I mentioned before, it can wind up costing you more money in the long run by having to upgrade and losing $$ in the process by having to sell the old gear at a loss. This also goes for learning what it will take to set things up and integrating it properly.
That being said, as
@dpc716 stated, you can keep some of the costs down by looking into the used market. I actually did this with my first system and saved a boatload of money...but you still have to be patient and wait on the good deals. Lol
Basically, it all boils down to the 'ol adage around here, which is, "Buy once. Cry once!", as well as, "It's not a sprint. It's a marathon, so enjoy the journey.", because these practices in mindset will not only save you some cash in the long-run, but it will give you the best possible experience based on set budget and proper integration.
A little long winded and a lot to digest here I know, but we all started out exactly where you are, and a vast amount of us on here learned these these the hard way...some even worse than others. Lol
Anyway, I hope this helps, and please share your thoughts/experiences with us once you're able to get your system put together.
Cheers! And welcome to the rabbit hole...
errrr...FORUMS!!
TF