The kit from 5speeds is one of the best kits out there, includes reinforced syncro rings. However, the rear seal from 5speeds is incorrect so you will have to get this from Burton Power.
Its also much cheaper from 5speeds.
Remember to check the dogs on each gear for damage, as well on the syncro sliders. If the dogs are rounded off (they should be sharp and pointed like the roof of a house) then theres no point in changing rings as they will just wear accordingly.