Andorra or any of the relatively low altitude places are great for beginners through to intermediates. I skied in Arinsal in Andorra in March a couple of years back and the snow was perfect. They added aritifical snow in the mornings and at lunchtime to keep the piste nice and skiable. The weather was fabulous too and the pair of us came back brown as berries, skiing in t-shirts every day. It can be hit and miss conditions wise as it is nearing the end of the season, but the lower prices usually reflect this. Snow seems to be in shortage everywhere this year so you could ski in January and have poor conditions. The resorts do prepare for all this by having their artifical snow machines.