Again, what Tele said. There is a huge amount of factors to consider when looking at guitars, and don't forget that some things cost a lot more money just because they have a big brand name on them. For instance, I tried out an Epiphone Explorer that cost £350, then tried a Gibson Explorer that cost £1500. I MUCH preferred the sound of the Epiphone, it kicked the Gibson's arse, massively.
Basically all you need to do is take a day off, grab one of your guitars, and go to your local guitar store. Spend a lot of time switching between your guitar and trying a lot of stuff out in the store, and then if you want to buy something that feels and sounds better than yours, go for it.
I have to say, though, you seem to be going about it in a fairly backwards kind of way when you say something like this:
"I may buy an expensive guitar and over time realise how much better it is. But I just wanted to be prepared for it. "
I personally think this is completely the wrong reason to be buying anything. You could do that, then spend a lot of time trying to get used to it and then find out that it's not actually for you at all. To me, if a guitar doesn't immediately give you that tingle or improvement in tone or feel in the store that you've been looking for, then you should put it back on the hanger and move on to the next guitar. Never buy something and then "get used to it" or realise over time how much better it is, because if it
is better, it should be immediately obvious. And if it
is immediately obvious, and it's giving the results you really want,
then it might be worth investing in. Parting with that amount of money for something that "may or may not" be better is way too much of a risk and largely a foolish thing to do.
I would seriously save your money mate, find out what it is
you are looking for, not what other people say you
should be looking for. If you're looking for a faster neck, a different tone, a different scale length, just something your current guitars don't do for you, then by all means listen to other people's opinions, but when all is said and done, it's you that has to live with whatever it is you buy, so it has to feel and sound right to your personal taste. Just go try loads of stuff out so you can build your own personal opinion of the things you like about them, then decide whether or not it's worth grabbing a new toy.
