Product selection help: wheelset for vintage(ish)steel roadbike I have an 80's vintage Peugeot steel frame that I'm gradually trying to upgrade.

I'm thinking about improving the wheels and originally thought a set of Mavic Aksiums would be a nice upgrade. Problem is, it's not really the right era of component for such a bike, although I think compatibility shouldn't be too much problem... 

I have also considered getting a set of wheels built that might look a bit more at home on the bike - Mavic Open Pros on a Shimano hub - (600 tricolours if I can get hold of some, modern 105s if not - they are just silver and quite plain looking so shouldn't ruin the look too much). Trouble is the second option is looking like minimum £230 for the set while the Aksiums can be have for £140.

My question is what would you recommend? Is the performance difference between the 2 options significant (not that this is ever going to be a competitive bike!)

Current wheels are a crappy £30 shimano road wheel on the back (original died) and the original maillard hub wheel on the front (which is actually pretty light but has a poor braking surface)
Why not keep a look out for some Mailard, Mavic or similar wheels from the early 80's on ebay. Should be much cheaper and fit with the frame more happily. With the cash you'll save you can get some quality brake pads that are designed to work on those steel rims.