Platinum engagement ring and white gold wedding band?

You'll need to have your white gold ring re-dipped really quite regularly - even more than those wearing it with a white gold ER as the difference will be so much more noticeable next to the platinum.

The white gold will wear also down against the platinum as it's a much softer metal.

White gold is just yellow gold with a different colour plating.

Have you looked at palladium? It is very close to platinum on the hardness scale so they won't tarnish or wear.

I have a platinum ER and palladium WR - my WR cost less than £100.

Oooh, thanks Kharv! Don't really know much about palladium but just the quickest of Google searches has thrown up some beauties. Some diamond set ones at a fraction of the cost of some of the plain platinum bands I'd seen!

Yes,as roseability said-palladium is a great idea,it's the same family of metals as platinum with a much lower cost. My OH wants palladium for his and we saw loads on Etsy,including his & hers sets for a reasonable price (most ship from the U.S.A.and Canada,but good prices) Also white gold will look different to platinum and will get worn fairly quickly.