Replacing PlusNet router

[Sadus]

Hi, last time I had a really advice so I'm back for a new one. I have a year old router from PlusNet but the speed inside the network is poor (WAN speeds to as I have up to 5Mbit/1Mbit as I am a bit far from exchange server or something). The problem is that when I try to copy a file from desktop PC to laptop it takes ages for a small file and copying a movie is not possible. I have to use USB stick to transfer files across. I am going to have a NAS at some point but until then I am thinking I need a better router. I live in a flat and the router is just 2 not so thick walls away. PC is on the LAN. I will be moving home soon and hopefully in the new place I will have better and faster internet so better router would be very good investment. What would you recommend?

 

[Sadus]

Laptop is on WLAN. If I find out how to share PC folder for MAC I could try it but I'm pretty sure it won't be much different. The motherboard unfortunately is not that new and it has only 1 x Gigabit LAN Controller.