I have two horses with KBIS. They are really great at helping you work out what kind of cover you need and have never tried to get me to take anything I didn't want. When I had to make a claim, the paper work was sent out by return of post and the full amount was paid in days! The premiums are £320 per year per horse, for £5000 vet fees, alternative therapy and £1m (I think) legal liability and the policy covers all riding club/ pony club activities, showing, gymkhanas, hacking, dressage etc. with an excess of £125
My other two horses are veterans and insured with South Essex as thier veteran plan is one of the best I've found, and they didn't insist on a 5* vet certificate. The premiums are £370 per year for the two of them. Again they are covered for all the usual activities but my excess is higher, I found that was the best way to bring the premiums down a bit as in view of thier age (21 and 19) they are not so likely to be injured but more likely to need age related health care. Strangely enough, (do horses become more sensible as they get older?) I've never had to claim (touch wood please!) for either of them where as the other two are everlasting getting into scrapes!
Anyway, I guess it pays to shop around. Decide what kind of cover you need, bear in mind that something simple that you might call the vet for could turn out to need several visits - what does your vet charge for call out? Mine is £30 a shot plus consultation plus treatment plus VAT. IE Touch of mild colic from too much rich grass back in the spring (one vet visit out of hours + one jab) cost me just under £200! Imagine - had it been a bad colic requiring surgery!
What activities are you planning on doing? Check it out because some events, such as polo or trail riding might not be covered, and if your horse was injured you might find yourself in a pickle!
One last point to make, when I registered with my vet, he asked who I was insured with, and promptly warned me that E&L may be the cheapest but they take forever to pay a claim. He insists that if you use E&L then YOU pay the bill and then claim from them. And I kinda agree, after all, if we call the vet to do a job then it's not right for him to be waiting ages to be paid - fair enough, if your vet took 3 weeks to come and see your horse then you'd change vet right? LOLs