Track spikes for cross country?

I definitely know the dilemma you are in, having gone through the same thing. The pair you have is excellent for mid/long distance track, but you will probably end up spending more money replacing them if you decide to use them for cross country, too. Nearly every course in xc will change up between concrete, dirt, mud, gr, etc. Although saving money would be great, I suggest you save up for a good cross country race shoe. The spikeless version is preferrable simply because in a long 3mi race it won't make a big difference on your time, and you won't have to worry about hard surfaces messing them up. As long as the shoe is very light (they are as light as track spikes are) you won't have any problems. There are great deals going on right now on quality race flats for less than $50. Eastbay.com is a great place to start. :)