I would recommend getting xc spikes if only for the fact that after a season of english mud your track spikes will be ruined if they're the very lightweight/delicate type! There isn't an awful lot of choice and the main difference is really fit and occasionally number of spikes so just try on the models of a few different brand and go for the ones that fit you best. I think only Nike has several different models of xc spike. None has really high heel lift though because of its nature as a speed shoe so if that's really important to you i'd go for something like inov8s or other trail shoes.
There are a lot actuallt, have a look at the North East runner website. Actually something on most weekends, Heaton Harriers Memorial 10km last Sunday, Norman Woodcock Memorial 5mile on the 23rd I think, and there was the Gibside Fruit Bowl 7 three weeks or so ago. If you're into cross country and member of a northern club there is the North East Harrier league which have 6 fixtures over the winter. In the summer also there are a lot of the local 10k's and Blaydon to look forward too.
Ironcat is right in that all spikes are neutral, the only difference really are between track and xc spikes although even those are interchangable. As spikes are designed to be very close fitting and super light you would have a hard time getting any sort of insole in there. Your best bet would be to try on a few different brands and models and just go with whichever feels best on your foot; some may feel more supportive just because of the shape of the sole and shoe as they may be more angled inside. If you're running xc though there is little need for support as your stridfe will be all over the place anyway due to the uneven terrain; a snug comfortable fit and grip are the main factors here.
I am looking to sell a pair of Saucony Mirage 2, size 5.5, blue and white colour if that is of relevance . Selling them because they rub my feet when and just don't suit the shape of my foot as bought them online. They are in very good condition, with box as only wore them for 2 runs, maybe ~10 miles total. No scuffing on the sole, as at 8 1/2 stone I am a pretty light runner so little impact has gone through them even on a tryout run.
Price negotiable, please email me at legsxi(at)live.com if interested at all.
For any curious or unbfamiliar with the shoe the Mirage is a transition or lightweight training shoe - very similar to the Kinvara, with a 4mm heel drop but with a bit of extra support so ideal for overpronators who would like to transition into more barefoot or midfoot style running. As it is much lighter than a traditional support shoe it would probably also work well as a race shoe for marathon/half marathon distances.