My current laptop is a little over 5 years old, and even though it's still in decent condition, I'd like to look into upgrading. I'm not really looking for anything extravagant or over-the-top in terms of specs, but it needs to be able to handle top of the line gaming and heavy work loads without issues. I'm willing to spend up to $700 ish, but obviously the cheaper the better. This budget does not include any accessories like monitors or speakers or anything like that. I'd like to stay away from laptops if possible (desktops should be cheaper anyway, right?).
Recently I've been looking through a lot of different black friday specials and stumbled upon newegg's DIY bundles (for example: this or this), which seem pretty cheap, but to be honest I've never built a computer myself and although I could probably figure out how to put it together, I have no idea where I'd need to go from there, or if this would even be a good route to go.
I'm mostly just looking for suggestions on what to look for and what to avoid. I want to learn.
Let me know if more information is needed on anything.