Well, according to www.samknows.com I'm 1.8km from the Exchange, and knowing where it is, I suspect the actual route wont be much different from the straight line route.
So short of moving next door ...
I'd been on 512kb Wanadoo broadband for some time, and never had any problems with it. I upgraded to 2mb, yes it was capped but, I went for it. Again, no problems.