I think I should upgrade my router. Would it be a good idea

Build one if you've already got parts and shit lying around and don't mind increased power consumption. Otherwise just buy an off-the-shelf one.

It really doesn't matter.

Buy one of these little PfSense boxes

Just find a cheap computer, either lying around or online with a NIC that's fast enough for your needs, along with an access point that fits your requirements. Stick pfSense on the computer and grab a switch, and you'll be good to go.

I've been using the WRT54G with DD-WRT for literal ages now. I've yet to run into any issues, other than the fact that the RAM on the router is constantly maxed out, but it doesn't effect my speeds at all.

>>60053881
If you want and need a NAS/home server then you should build your own. If you do not want that then you should absolutely just go buy an off the shelf one or get a used one close to free.

And if you're in Sweden then you can have a WRT54GL one for free, I have 8 of those in the basement (not paying international shipping for you to have them, though).

A home server box with a motherboard and CPU and 2-5 ethernet cards and a bunch of harddrives in it does draw some power. This is what I personally use since I do like to have a 24/7 server that also runs things like YaCy, Bitcoin, Tor and other things. It's also a NAS. This box is online all day every day and that adds up over the year.

A simple router box off the shelf draws perhaps 5W continuously and that's nothing compared to any computer system. This is more true the older your computer is.

If you just want a router then the cheapest way to get one is a flee-market or used. You can probably find one for $2-5. The reason for this is that Wirelss AC is now the new thing. If you don't care about wireless then you can buy a wireless router and turn that off and just use it as a router. One which only has Wireless G or Wireless N should work just fine if you only want routing and and there are plenty of those thrown or given away when people upgrade to wireless AC.